Why Does My Espresso Taste Sour? Common Causes and How to Fix It

You’ve measured your coffee beans, adjusted your grinder, tamped the grounds, and pulled what looks like a perfectly respectable espresso shot. There’s even a layer of golden crema on top. But when you take that first sip, instead of rich chocolate, caramel, or balanced sweetness, you’re greeted by a sharp, unpleasantly sour flavor.

Sour espresso is a common frustration when learning to make coffee at home. Fortunately, it’s usually something you can improve by adjusting your brewing technique rather than replacing your espresso machine or buying more expensive beans.

The most common reason espresso tastes sour is under-extraction. This happens when the brewing process doesn’t dissolve enough of the coffee’s desirable flavor compounds, leaving the finished shot tasting overly acidic, thin, or underdeveloped.

A grind that’s too coarse is one of the most frequent causes, but water temperature, brewing ratio, coffee dose, uneven extraction, and the beans themselves can also play a role.

The solution isn’t always as simple as grinding finer. Sometimes your espresso needs a longer extraction, a warmer brewing temperature, or more consistent puck preparation. Other times, the coffee naturally has a bright, fruity flavor that you’re interpreting as sourness.

Understanding the difference can help you stop guessing and start making espresso that tastes the way you want.

Here’s why homemade espresso tastes sour, how to identify the cause, and what to change to make your next shot more balanced.

☕ What Makes Espresso Taste Sour?

All coffee contains naturally occurring acids that contribute to its flavor.

These include citric, malic, and other organic acids that can create flavors reminiscent of citrus fruit, apples, berries, or wine.

In a properly prepared espresso, acidity contributes brightness and complexity. It should be balanced by sweetness, body, bitterness, and other flavors.

However, when the extraction is incomplete or uneven, that balance can shift.

Instead of tasting pleasantly bright, the coffee may seem sharply sour, thin, salty, or hollow.

One common explanation is that different compounds dissolve from coffee at different rates during brewing. In an under-extracted shot, the overall mixture of dissolved compounds may emphasize acidity without enough sweetness, body, and other characteristics to create balance.

The result can taste like biting into an underripe piece of fruit.

Breville identifies coarse grinding, insufficient coffee dose, and other extraction problems as common causes of sour espresso.

Barista Hustle’s Espresso Compass also associates excessive sourness with extraction problems, particularly when the finished beverage lacks sweetness and balance.

The important point is that sourness is a symptom, not a complete diagnosis.

To fix it, you need to determine which part of your brewing process is preventing the coffee from tasting balanced.

🍋 Sour Espresso vs. Naturally Acidic Espresso

Before changing your grinder, it’s worth considering whether the flavor you’re noticing is actually a problem.

Not all acidity in coffee is unpleasant.

A light-roasted Ethiopian coffee might have distinctive lemon, berry, or floral notes. Another coffee might taste like green apple, orange, or stone fruit.

These characteristics can be desirable and are often part of what makes specialty coffee interesting.

The difference between pleasant acidity and unwanted sourness is largely about balance.

Pleasant acidity usually feels lively and refreshing. It works with the coffee’s sweetness and other flavors rather than overwhelming them.

Unpleasant sourness tends to dominate the entire shot.

The espresso may taste sharply acidic without much sweetness, body, or lingering flavor.

It might remind you of underripe fruit, sour candy without sweetness, or an excessively tart citrus juice.

Texture can also provide clues.

Under-extracted espresso often feels thin or watery, although a shot can still be concentrated and taste sour if extraction is uneven.

If you’re trying a new light roast, consider whether the acidity is part of the coffee’s intended flavor profile.

If the shot tastes balanced despite being bright, you may not need to fix anything.

However, if it tastes unpleasantly sharp and lacks sweetness, troubleshooting the extraction is worthwhile.

⚙️ 1. Your Espresso Grind Is Too Coarse

One of the most common causes of sour espresso is using coffee grounds that are too coarse.

Espresso requires a fine grind because hot water passes through the compacted coffee under pressure over a relatively short period.

The coffee grounds need to create enough resistance for the water to extract a balanced mixture of soluble compounds.

When the grounds are too coarse, water may pass through the coffee bed too quickly.

This reduces the opportunity for sufficient extraction.

For example, suppose you’re using 18 grams of ground coffee and aiming for 36 grams of finished espresso.

If the machine reaches that yield in only 15 seconds and the shot tastes thin and sharply sour, the grind is probably too coarse.

The first adjustment should usually be to grind slightly finer.

Finer grounds generally create more resistance, slowing the flow of water.

They also expose more surface area, potentially increasing extraction.

However, it’s important to make small adjustments.

Espresso grinders can be extremely sensitive, and moving several settings finer may cause the next shot to barely flow.

Change the grinder one small step at a time, prepare another shot, and compare the results.

Keep the coffee dose and target yield consistent while making the adjustment.

If the espresso begins tasting sweeter and more balanced, you’re moving in the right direction.

For a broader explanation of grinder adjustments, see Coffee Grinder Settings Explained.

⏱️ 2. Your Espresso Shot Is Pulling Too Fast

Closely related to grind size is extraction time.

Espresso is commonly brewed over approximately 25–30 seconds, although excellent shots can fall outside that range.

Breville uses this timing as a starting point for dialing in espresso while emphasizing that taste remains the final measure of success.

If your shot reaches its target yield much faster than expected, it may be under-extracted.

For example, using 18 grams of coffee to produce 36 grams of espresso in 12–15 seconds would suggest a relatively fast extraction.

If the finished shot also tastes sour and watery, there is good reason to investigate the grind size and coffee puck.

However, extraction time isn’t an absolute measure of quality.

A shot that takes 22 seconds can taste excellent, while another shot taking 30 seconds may still be unpleasantly sour.

The beans, basket, machine, pre-infusion, and brewing recipe all affect timing.

Some machines begin timing as soon as the brewing button is pressed, while others display a shot timer that behaves differently.

For consistency, choose a timing method and use it every time.

If your espresso is flowing unusually quickly, begin by making the grind slightly finer.

If the flow remains inconsistent despite appropriate grinding, examine the coffee dose and puck preparation.

The goal is a balanced extraction rather than reaching an exact number on a stopwatch.

⚖️ 3. You’re Stopping the Espresso Shot Too Early

Sometimes the grind size is reasonably close to correct, but the espresso still tastes sour because the brewing ratio is too short.

The espresso ratio compares the weight of dry ground coffee with the weight of the finished beverage.

A common starting point is 1:2.

This means using 18 grams of ground coffee to produce approximately 36 grams of liquid espresso.

However, some coffees taste better when you allow additional water to pass through the puck.

For example, if your 18-gram dose produces a sour shot at 30 grams of espresso, you might try extending the yield to 36 grams.

If the shot still tastes underdeveloped, experimenting with 40–45 grams may help.

Increasing the beverage yield generally allows more extraction to occur, although it also produces a larger, less concentrated drink.

This approach can be particularly useful for certain light-roasted coffees.

However, don’t assume that a longer shot will automatically improve every sour espresso.

If the coffee is already extracting unevenly, extending the shot may emphasize unpleasant flavors.

For a reliable starting point, use a 1:2 ratio and adjust gradually.

Keep the dose consistent while experimenting with the beverage yield.

For more information about how grind size affects this process, read Coffee Grind Size Guide: The Best Grind for Every Brewing Method.

🌡️ 4. Your Brewing Water Isn’t Hot Enough

Water temperature is another important factor in espresso extraction.

Hot water dissolves compounds from ground coffee, and changing the temperature can affect how efficiently that process occurs.

If the brewing temperature is too low for the coffee you’re using, the finished espresso may taste underdeveloped or unpleasantly sour.

A common starting range for espresso brewing is approximately 195–205°F (90–96°C).

However, the ideal temperature depends on the roast level, coffee beans, machine, and brewing recipe.

Light-roasted coffees sometimes benefit from brewing toward the higher end of the range because they can be more challenging to extract.

Dark roasts may taste better at somewhat lower temperatures.

Before adjusting the temperature, make sure your espresso machine is fully warmed up.

Some machines indicate that they’re ready to brew before every metal component has reached a stable temperature.

The portafilter and group head may still be relatively cool.

If your machine’s instructions recommend additional warm-up time, follow them.

You can also preheat the portafilter according to the manufacturer’s directions.

Breville recommends flushing hot water through the group head and portafilter as part of preparing certain machines for espresso.

This can help improve temperature consistency.

If your machine has adjustable brewing temperature, experiment with a small increase after checking your grind and ratio.

Avoid making several changes simultaneously.

A slight temperature adjustment may improve a sour light-roast espresso, but it won’t necessarily correct a shot that is running much too quickly.

🫘 5. Your Coffee Beans Are Light Roasted

Sometimes sourness is related to the coffee itself rather than an obvious brewing mistake.

Light-roasted coffee often contains more noticeable acidity than darker roasted coffee.

Depending on its origin, variety, and processing method, it may have flavors resembling citrus fruit, berries, flowers, or tart apples.

These characteristics can be enjoyable when the espresso is properly extracted.

However, light roasts may require a different brewing approach from traditional medium-dark espresso blends.

Light-roasted beans are generally denser and less soluble than darker roasted beans.

This can make it more difficult to achieve balanced extraction using a short recipe developed for a darker roast.

You may find that a light roast needs a slightly finer grind, a longer beverage yield, or a higher brewing temperature.

For example, a coffee that tastes unpleasantly sharp at an 18-gram dose and 36-gram yield might become more balanced at a 42-gram yield.

The exact adjustment depends on the beans and equipment.

However, it’s also possible that the coffee simply has a flavor profile you don’t enjoy.

If you’ve adjusted the brewing recipe and the espresso still tastes brighter than you prefer, consider trying a medium or medium-dark roast.

Coffee blends with chocolate, caramel, nutty, or traditional espresso flavor descriptions may be more appealing if you prefer lower perceived acidity.

The best coffee isn’t necessarily the one with the most complex tasting notes.

It’s the one that produces flavors you enjoy drinking.

🧱 6. Your Coffee Puck Is Extracting Unevenly

Espresso can taste sour even when the grind size, dose, and extraction time appear reasonable.

One possible cause is channeling.

Channeling occurs when water flows unevenly through the coffee puck, passing more readily through certain areas than others.

Instead of moving relatively evenly through the entire bed of coffee, water finds paths with less resistance.

Some grounds may receive excessive water flow, while other areas are insufficiently extracted.

This can produce a confusing mixture of flavors.

Barista Hustle’s Espresso Compass explains that sourness and bitterness can occur together when espresso extraction is uneven.

You might notice a shot that tastes sharply sour at first but also leaves a harsh, drying sensation afterward.

The problem may not be that the entire shot is simply under-extracted or over-extracted.

Different portions of the puck may be extracting differently.

Uneven distribution is one possible cause.

If the grounds form dense clumps or accumulate more heavily on one side of the basket, water may struggle to flow consistently.

Tamping at an angle can also contribute.

To improve puck preparation, begin with a clean, dry basket.

Add the appropriate dose and distribute the grounds as evenly as possible.

A suitable distribution tool can help break up clumps, although careful manual preparation can also produce good results.

Tamp firmly and evenly, keeping the tamper level.

Avoid disturbing the coffee puck after tamping.

If the shot becomes more balanced after improving distribution, you’ve identified an important part of the problem.

☕ 7. You’re Using the Wrong Coffee Dose

The amount of coffee in your filter basket can also affect espresso extraction.

If the basket is significantly underfilled, the coffee puck may not provide the intended resistance.

This can contribute to fast flow and under-extraction.

For example, using 12 grams of coffee in a basket designed for approximately 18 grams may produce very different brewing behavior from the manufacturer’s intended recipe.

However, overfilling the basket creates its own problems.

Too much coffee can leave insufficient space between the puck and the machine’s shower screen.

This may interfere with water distribution or prevent the portafilter from seating correctly.

The solution is to use a consistent dose appropriate for your basket.

If your basket is rated for approximately 18 grams, begin near that amount.

Use a digital scale to measure the dry ground coffee rather than relying on a scoop.

Also remember that the correct dose varies by machine and basket.

An 18-gram recipe isn’t appropriate for every espresso maker.

Once you establish a suitable dose, keep it consistent while adjusting grind size and yield.

This makes troubleshooting much easier because you’re changing one variable at a time.

🕒 8. Your Coffee Beans Are Too Fresh or Too Old

Coffee freshness affects espresso flavor and extraction behavior.

After roasting, coffee beans gradually release carbon dioxide and undergo changes in their aromatic compounds.

These changes influence how the coffee behaves during brewing.

Beans used immediately after roasting can sometimes be difficult to extract consistently because they still contain substantial amounts of gas.

Excess gas release can affect how water moves through the puck and may contribute to unstable extractions.

Many espresso drinkers allow freshly roasted beans to rest for several days before brewing.

However, the appropriate resting period depends on the coffee and roast level.

Some coffees benefit from a longer resting period than others.

Older coffee presents a different problem.

As beans age, they lose aromatic complexity and freshness.

Espresso prepared from stale beans may taste flat, hollow, or unpleasantly sharp rather than richly balanced.

Older beans may also require grinder adjustments because their brewing behavior changes over time.

If your espresso suddenly begins tasting different despite using the same recipe, check the roast date and storage conditions.

Store beans in a cool, dry location inside suitable packaging or an airtight container.

Avoid leaving them exposed to heat, moisture, or direct sunlight.

Our Best Way to Store Coffee Beans guide explains how storage affects freshness and flavor.

🔧 How to Fix Sour Espresso Step by Step

When espresso tastes sour, the most effective approach is to troubleshoot systematically.

Changing every setting at once makes it difficult to determine what improved the shot.

Instead, establish a consistent starting recipe and make small adjustments.

Step 1: Begin With a Standard Espresso Recipe

Choose a dose appropriate for your filter basket.

For a typical 18-gram double basket, begin with 18 grams of coffee and aim for approximately 36 grams of finished espresso.

This provides a 1:2 beverage ratio.

Use freshly ground coffee and ensure your espresso machine is properly warmed up.

Step 2: Measure the Extraction Time

Place your espresso cup on a scale and start the extraction.

Measure the time using a consistent method.

If the shot reaches 36 grams much faster than approximately 25–30 seconds, the grind may be too coarse or the puck may have insufficient resistance.

If the flow appears reasonable, taste the coffee before deciding what to change.

Step 3: Adjust the Grind if the Shot Runs Too Fast

Move the grinder slightly finer.

Prepare another shot with the same dose and target yield.

If the espresso flows more slowly and tastes sweeter or more balanced, the adjustment is helping.

If the machine begins struggling to push water through the puck, you’ve probably moved too fine or introduced another resistance problem.

Return to a slightly coarser setting.

Step 4: Try a Longer Yield if the Shot Is Still Sour

If the grind is reasonably well adjusted but the espresso still tastes under-extracted, experiment with a slightly longer beverage yield.

For example, increase the finished espresso from 36 grams to 40 grams while keeping the dose at 18 grams.

Taste the result.

If the flavor improves, try another small increase.

If the espresso becomes thin, bitter, or unpleasantly dry, you may have gone too far.

Step 5: Check Temperature and Puck Preparation

If the espresso continues tasting sour, confirm that the machine is fully heated.

Use the manufacturer’s recommended warm-up procedure.

Check that the grounds are evenly distributed and tamped level.

If your machine allows temperature adjustment, experiment cautiously with a slightly warmer setting, particularly for light-roasted coffee.

Step 6: Consider the Coffee Beans

Finally, consider whether you’re using beans with naturally high acidity.

If the extraction seems consistent and balanced but the espresso still tastes sharper than you enjoy, try a different coffee.

A medium or medium-dark roast may provide a more traditional chocolatey or nutty espresso flavor.

The purpose of troubleshooting isn’t to eliminate every trace of acidity.

It’s to produce a shot with a satisfying balance of flavors.

📊 Sour Espresso Troubleshooting Chart

The following chart provides a quick starting point when you’re trying to decide what to adjust.

What you notice	Possible cause	What to try
Sour, thin espresso that flows very quickly	Grind too coarse	Grind slightly finer
Sour espresso with a very short beverage yield	Extraction stopped too early	Increase the yield slightly
First shot tastes sour, later shots improve	Machine or portafilter not fully warm	Follow the recommended warm-up procedure
Sour and bitter flavors together	Uneven extraction or channeling	Improve distribution and tamping
Light-roast espresso tastes sharply acidic	Brewing recipe may not suit the coffee	Try a longer yield or appropriate higher temperature
Espresso flows quickly with a small dose	Basket may be underfilled	Use a dose appropriate for the basket
Flavor changes as a bag of beans ages	Changing coffee freshness and extraction behavior	Make small grinder adjustments

These are starting points rather than guaranteed diagnoses.

If your shot has more than one problem, you may need to work through several variables.

However, making one controlled adjustment at a time gives you a much clearer understanding of what is happening.

🥛 Why Does Espresso Taste Sour Even in a Latte?

Sometimes the espresso tastes acceptable on its own but becomes strangely sour when mixed with milk.

This can happen for several reasons.

Milk softens the intensity of espresso and changes the balance of flavors in the finished drink.

A bright, fruity espresso that tastes interesting as a straight shot may taste less pleasant when combined with large amounts of milk.

Certain acidic flavors may become more noticeable or clash with the milk’s sweetness and texture.

However, if the espresso itself is sharply under-extracted, adding milk won’t necessarily correct the problem.

The unpleasant acidity may still come through, particularly in drinks containing relatively little milk.

Before changing the milk recipe, taste the espresso on its own.

If it is sour and underdeveloped, improve the extraction first.

If it tastes balanced but simply doesn’t work well with milk, consider trying a different coffee.

Many traditional espresso blends are developed to pair well with milk and feature chocolate, caramel, or nutty flavors.

A medium or medium-dark roast may be a better match if you prefer classic café-style lattes and cappuccinos.

Also make sure the milk itself is fresh and has been stored properly.

Milk that has actually soured is a separate food-quality problem and shouldn’t be used.

🧼 Can a Dirty Espresso Machine Make Coffee Taste Sour?

A dirty espresso machine can affect flavor, although old coffee residue more commonly produces stale, rancid, or bitter characteristics than distinctly sour ones.

Coffee oils and fine particles can accumulate around the portafilter, basket, shower screen, and brewing components.

Over time, this residue may interfere with normal water flow and contribute unpleasant flavors.

If your espresso suddenly tastes different and grind adjustments aren’t helping, check the equipment.

Remove old grounds after each shot and clean the filter basket according to the manufacturer’s instructions.

Wipe accessible coffee residue from the group head and follow the recommended cleaning routine for your machine.

Some espresso machines require periodic backflushing with an approved cleaning product.

However, not every model supports backflushing, so always consult the owner’s manual.

Mineral buildup can also affect certain machines, potentially interfering with water flow or temperature control.

If the manufacturer recommends descaling, use an approved descaling procedure rather than experimenting with household cleaning chemicals.

Your grinder also deserves attention.

Old grounds and coffee oils can accumulate in the burr chamber and chute, affecting freshness and consistency.

For detailed maintenance instructions, see How to Clean a Burr Coffee Grinder.

🎯 How to Make Espresso Taste Sweeter and More Balanced

Once you’ve eliminated the obvious causes of sourness, the next goal is to improve the overall balance of your espresso.

A satisfying shot doesn’t need to taste sugary.

Instead, sweetness in coffee refers to the perception of pleasant, rounded flavors that balance acidity and bitterness.

Depending on the beans, you might notice flavors reminiscent of caramel, chocolate, honey, dried fruit, or toasted nuts.

Achieving that balance begins with consistent brewing.

Use a suitable dose, grind the coffee immediately before brewing, and prepare the puck evenly.

Measure the finished beverage by weight.

If you’re just beginning, a 1:2 ratio is an excellent starting point.

Taste the result before changing anything.

If the espresso is sour and thin, investigate whether it needs finer grinding or a longer yield.

If it is harsh and excessively bitter, consider whether the grind is too fine, the yield is too long, or the coffee’s roast level is contributing.

Pay attention to the temperature and freshness of the beans.

Most importantly, remember that different coffees have different ideal recipes.

A bright single-origin light roast may require a different approach from a traditional medium-dark espresso blend.

Learning to adjust the brewing process to suit each coffee is one of the most useful skills you can develop as a home barista.

❓ Frequently Asked Questions

Why is my espresso sour instead of bitter?

Sour espresso is commonly associated with under-extraction, meaning the brewing process hasn’t dissolved enough compounds to create a balanced flavor. Bitter espresso may be associated with excessive extraction, roast characteristics, or other brewing problems. However, sourness and bitterness can occur together when extraction is uneven.

Should I grind finer if my espresso tastes sour?

Often, yes. If the shot runs unusually quickly and tastes sour or thin, grinding slightly finer is a sensible first adjustment. Finer grounds generally create more resistance and can increase extraction. However, if the shot already flows slowly, investigate puck preparation, temperature, and beverage yield before grinding finer.

Can espresso be sour because the grind is too fine?

Yes. Although sour espresso is often associated with coarse grinding, an excessively fine grind can contribute to uneven extraction and channeling. Water may find paths through the puck rather than flowing evenly through the grounds, leaving some areas under-extracted.

What does under-extracted espresso taste like?

Under-extracted espresso often tastes sharply sour, thin, hollow, or underdeveloped. It may lack sweetness and body. However, the exact flavor depends on the coffee beans and brewing conditions, and not every acidic espresso is under-extracted.

Is sour espresso safe to drink?

Espresso that tastes sour because of its natural acidity or an under-extracted brewing recipe is generally safe to drink when prepared from safe ingredients and properly maintained equipment. However, if the sour flavor comes from spoiled milk, contaminated ingredients, or another food-safety problem, discard the drink.

Does sour espresso mean the beans are bad?

Not necessarily. Sourness often indicates a brewing issue or reflects the natural acidity of the coffee. Light-roasted beans can have bright, fruity flavors even when they’re fresh and properly prepared. However, stale or poorly stored beans may produce unpleasant flavors that are difficult to correct through brewing.

How long should espresso take to avoid sourness?

Approximately 25–30 seconds is a useful starting range for a traditional double espresso, but it isn’t a guarantee of balanced flavor. Some coffees taste excellent with shorter or longer extraction times. Use shot time alongside coffee dose, beverage yield, and taste to determine the best recipe.

Why does my espresso taste sour even after grinding finer?

The problem may involve an overly short beverage yield, insufficient brewing temperature, uneven puck preparation, or the coffee’s natural acidity. Grinding excessively fine can also contribute to channeling. Keep your dose consistent and troubleshoot one variable at a time.

Does a longer espresso shot make it less sour?

Sometimes. Increasing the beverage yield can allow additional extraction, which may improve the balance of a sour, under-extracted shot. However, an excessively long yield can make espresso thin, bitter, or drying. Experiment with small increases rather than making the shot dramatically longer.

Can low water temperature make espresso sour?

Yes. Water that is too cool for the coffee and brewing recipe may contribute to under-extraction. Make sure your espresso machine is fully warmed up. If the machine allows temperature adjustment, a modest increase may help, particularly with certain light-roasted coffees.

Why does my first espresso shot taste sour but the second one tastes better?

One possibility is that the brewing components weren’t fully warmed up before the first shot. The group head and portafilter may become more temperature-stable after the machine has been operating for a while. Follow the manufacturer’s warm-up procedure and compare shots using the same dose, yield, and grind setting.

Is light-roast espresso supposed to taste sour?

Light-roasted espresso often has more noticeable acidity than dark-roasted espresso. Pleasant citrus, berry, and fruit-like flavors can be normal. However, overwhelming sourness without sweetness or body may indicate that the extraction needs adjustment.

Why does my espresso taste sour and bitter at the same time?

This combination can indicate uneven extraction. Water may pass too quickly through some parts of the coffee puck while extracting other areas differently. Improving grind consistency, distribution, and tamping can help produce a more uniform extraction.

Does tamping harder fix sour espresso?

Not usually. Tamping should create a firm, level puck, but excessive pressure isn’t a substitute for the correct grind size. If the shot runs too quickly because the grounds are too coarse, adjusting the grinder finer is generally more effective than tamping harder.

Can a pressurized filter basket cause sour espresso?

A pressurized basket can produce sour espresso if the coffee isn’t extracted adequately. These baskets create additional resistance at the outlet, so the relationship between grind size and flow differs from a traditional non-pressurized basket. Follow the machine manufacturer’s recommendations and adjust the dose and grind within the appropriate range.

✨ Final Thoughts

Sour espresso is one of the most common problems home baristas encounter, but it’s also one of the most useful brewing problems to learn how to solve.

In many cases, the underlying issue is under-extraction.

The water may be flowing through the coffee too quickly, the grind may be too coarse, or the shot may be stopping before enough flavor has developed.

Other possible causes include low brewing temperature, an unsuitable coffee dose, uneven puck preparation, or a brewing recipe that doesn’t suit the beans.

Fortunately, you don’t need to change everything at once.

Begin with a consistent recipe, such as 18 grams of coffee producing approximately 36 grams of espresso.

If the shot flows very quickly and tastes sour, try grinding slightly finer.

If the extraction time seems reasonable but the coffee remains underdeveloped, experiment with a slightly longer beverage yield.

Make sure your espresso machine is fully warmed up and the grounds are evenly distributed.

Finally, remember that acidity isn’t always a flaw.

A bright, fruity espresso can be delicious when its acidity is balanced by sweetness, body, and other flavors.

The goal isn’t to remove every acidic note from your coffee. It’s to eliminate the unpleasant sharpness that prevents those flavors from working together.

With a little practice, you’ll begin recognizing how grind size, extraction time, temperature, and brewing ratio influence the cup.

And once you can identify why a shot tastes sour, making the next one sweeter, richer, and more balanced becomes much easier.