Why is my coffee sour?

In this brief guide, we will answer the question, “why is my coffee sour,” and discuss how to fix sour coffee, and does coffee become sour when cold?

Why is my coffee sour?

There are three main reasons your coffee might taste sour, and one of them is that you actually have a sour coffee. Let’s talk about the three most common causes.

One: the coffee you’re using is old. Coffee goes bad quickly, and it usually goes sour first. The more acidic the coffee, the faster it will go bad, so if it’s a rich Ethiopian blend, it probably should be used within two weeks after opening.

Two: you didn’t brew your coffee at precisely the right temperature and for exactly the right amount of time. For example, if you use cold water instead of boiling water to make your coffee, your acidity levels will be off, and that can result in a sour flavor.

Three: your coffee is naturally high in acidity. If you buy a light roast from an African country like Ethiopia or Kenya, expect a tangy cup!

How to fix sour coffee?

There are several ways to adjust the acidity of your coffee. Coffee that is too acidic or sour can be unpleasant to drink, but there is no need to throw out a pot of coffee just because it tastes sour.

Measure your grounds

Use one rounded tablespoon of ground coffee for every six ounces of water. Using too much coffee can result in a bitter taste, while too little may leave your brew tasting weak and flavorless.

Use fresh whole beans

Coffee should be brewed with whole beans that have been ground immediately before brewing, not pre-ground beans. If you use pre-ground, store-bought coffee, try switching to a local roaster or grinding your own beans.

Choose filtered water

Water quality has a huge impact on the taste of your coffee, so use filtered or spring water for the best results. Tap water usually contains minerals and chemicals that can impact the flavor of your coffee.

Try using a different kind of coffee bean

Most coffees are made from arabica beans, but some are made from robusta beans. Robusta beans tend to taste less sour than arabica beans, so this could be a good option for people who don’t like sour coffee.

Add milk or cream

Add milk or cream instead of water when brewing your coffee at home. This will give it a creamier flavor that may help to balance out the sourness of the coffee grounds that were used in making your brew.

Add some more sugar

If you can’t stand the bitterness, try adding some sugar to your cup instead! You can also use honey or agave nectar for sweetness without all those extra calories from refined sugars in regular white sugar packets found at restaurants and cafes near you today!

Does coffee become sour when cold?

Coffee doesn’t become sour when it’s cold. Instead, it becomes stale over time, if you don’t store it in a very specific way.

According to experts at the International Coffee Organization, the best way to store coffee is in an airtight container in the freezer. This will ensure that it stays fresh for up to two years.

While coffee may not become “sour” when cold, there are some other things that can go wrong with your cup of joe after you store it in the fridge or freeze it. One thing is that the coffee can become diluted by condensation while it’s cooling off.

This can make your coffee taste watered down, which means it will be weaker than if you had just brewed a fresh batch. Another issue is that the beans themselves may begin to develop mold or fungus if they’re not kept dry enough, which would also affect their taste and flavor over time.

Does French press coffee taste sour?

The answer to whether French press coffee tastes sour depends on how it is prepared. If a French press is used correctly, then the coffee will taste sweeter and less bitter. However, if there is too much coffee or grinds for the amount of water being used, then the resulting drink can taste sour.

In order to make a good cup of French press coffee, start with fresh beans. Grind them just before you need them to keep them from losing flavor while they sit whole and unground.

Once they are ground, do not let them sit for more than 30 seconds before pouring hot water over them in a French press. This is because the longer they sit on the ground, the more bitter they become and the more time they have to begin releasing oils that will eventually turn rancid.

Next, make sure you have enough grinds for the amount of water you’re using. A good ratio is one pound of water (or 16 ounces) for every half-pound (or eight ounces) of ground coffee beans. Once you have decided on this ratio, be sure to measure both accurately so that your result is consistent each time you brew your French press coffee.

Finally, make sure to use high-quality water when brewing the coffee itself. Using clean, filtered water will enhance the taste of coffee.

Other FAQs about Coffee that you may be interested in.

Why is Mcdonald’s coffee so hot?

What is the difference between decaf and regular coffee? 

What is the difference between coffee and latte?


In this brief guide, we have addressed the question, “why is my coffee sour,” and other questions related to the subject, such as how to fix sour coffee, and does coffee become sour when cold?