3 Possible Reasons Why Does Coffee Smell Like Poop

Have you ever noticed why does coffee smell like poop? It’s a common phenomenon, and it has an interesting explanation.

This article will help you understand why coffee smells like poop. You’ll learn tips to avoid this smell.

Why Does Coffee Smell Like Poop – 3 Top Reasons

If you’ve ever wondered why coffee sometimes smells like poop, you’re not alone. Many people feel that smell due to various reasons.

It turns out there are three main reasons why this strange phenomenon occurs.

1. 2-Methylisoborneol:

The first reason is due to a chemical compound called 2-Methylisoborneol.

Why Does Coffee Smell Like Poop

It is found in some species of algae and can make its way into the water used to brew your coffee.

This compound has an odor that some people describe as smelling like human feces.

2. Type Of Beans:

The second reason your cup of joe might smell like poop is the type of bean used. Certain varieties, such as Indonesian coffees, contain aromatic compounds.

These compounds produce strong aroma notes reminiscent of manure and other organic odors.

3. Brewing Method:

Finally, the third reason why coffee can smell poopy is the way it’s brewed.

Certain compounds can be activated if the beans are over-roasted or subjected to high temperatures during brewing.

These compounds give off an unpleasant odor similar to poop.

So now you know why your daily cup of coffee might have a hint of poop aroma. You can take steps to cut this problem.

You can use methods such as roasted beans and temperature control when brewing.

Effects Of The Roasting Process On The Smell Of Coffee

Roasting is one of the most important stages in creating a delicious cup of coffee.

It can transform the flavor and aroma of the beans, making them more palatable and aromatic.

But what about its effect on the smell? Does roasting influence the aroma of coffee?

Yes, roasting has a considerable impact on how coffee smells.

1. During this process, certain molecules are released from the bean.

It gives an intense fragrance to the coffee. It can sometimes be detected even before being brewed.

2. The longer beans are roasted, the stronger their scent becomes. Too much flavor will be lost if they’re over-roasted.

Roasted beans give off a fruity, acidic aroma with floral notes. Darker roasts tend to release a more chocolatey, smoky scent.

It is due to the increased development of carbonization and oils within the beans.

3. Different types of coffee also tend to have distinct smells that are unique to their origin.

For example, you might notice a cinnamon-like smell in African or Central American coffee. In comparison, Brazilian beans produce an earthy scent.

4. Many people find these naturally occurring aromas more pronounced during roasting.

In short, the roasting process definitely affects the smell of coffee. It can be quite profound.

Enjoying the aroma of freshly brewed coffee is an essential part of the experience.

Understanding how roasting affects its scent can help you savor each cup even more.

Tips To Avoid Poopy Smell From Coffee

When it comes to coffee, one of the most unpleasant smells is poop.

You can use some tips and tricks to help avoid this smell from your coffee.

1. Store In Air Tight Container:

First, make sure to store your coffee beans in an airtight container.

This will keep oxygen from getting in and causing any fermentation. The fermentation could cause off-aromas.

2. Grinder Type:

Second, consider investing in a good grinder for your beans. A consistent grind size helps ensure even extraction during brewing.

It can reduce the chance of bad flavors coming through in your cup. Burr grinders are usually preferred because they provide more consistency than blade grinders.

3. Water Temperature:

Third, check the water temperature when you’re brewing your coffee. If it’s too low, the extraction won’t be strong enough, and you’ll get weak coffee.

If it’s too high, it can bring out flavors that may not be pleasant. Around 195°-205°F is usually accepted as a good temperature range for brewing coffee.

4. Extraction Time:

Fourth, keep an eye on your extraction time. The right amount of time helps extract all the ground compounds.

coffee - Why Does Coffee Smell Like Poop

You will not have any unpleasant surprises when you take a sip.

5. Brew Method:

Experiment with different brew methods and determine what works best for you.

Different brewing techniques could bring out different flavors or aromas. These may appeal to your tastes more than others.

With enough practice and experimentation, you’ll find the perfect blend that tastes good and doesn’t have any of those poop smells.

Following this guide can avoid the unpleasant experience of sipping coffee with a ‘poop smell’.

With the right water temperature and brewing time, you’ll be able to enjoy your cup of joe every single time.

Common Mistakes To Avoid While Brewing Coffee

Some common mistakes can ruin your coffee. Here are a few of the most important ones:

1. Using Poor Quality Beans:

One of the biggest culprits behind bad-tasting coffee is using poor-quality beans.

Make sure to buy fresh, high-quality beans and grind them before brewing for the best flavor and aroma.

2. Not Preheating Your Equipment:

It’s easy to get distracted while making coffee. Always preheat your equipment before starting anything else.

This will guarantee an even temperature for optimal taste throughout the extraction process.

3. Over-Extracting Coffee:

When it comes to extracting coffee, less is more.

Over-extracting can lead to a bitter cup of joe, so use the right amount of coffee and water for your brewing method.

4. Not Storing Coffee Properly:

Freshness is key to the flavor and aroma of your cup of coffee. Store unused beans in a cool, dry place away from direct sunlight.

Remember that pre-ground coffee loses its flavor. It should be used as soon as possible after grinding.

5. Not Cleaning Your Equipment:

Keep your coffee-making equipment clean. Any residue left behind from previous brews will affect the taste of your current cup.

Make sure to clean all parts of your coffee maker regularly.

6. Using Old Coffee:

Another common mistake that can ruin your beverage is using old or stale beans.

Check the expiration date before you brew. Discard any aged coffee sitting around too long.

7. Over-Brewing:

This is when you let your coffee sit in the brewer for too long. It resulted in an overly bitter cup of Joe due to the over-extraction of the coffee grounds.

Set a timer and pay attention to the brewing process to avoid this. In that way, you can remove it from the heat immediately.

8. Skimping On Quality Ingredients:

If you want great-tasting coffee every time, use high-quality beans. This affects the taste of your coffee.

Also, use water that’s free from chlorine and other sediment. Paying attention to the details will make a big difference in the flavor of your brew.

9. Not Paying Attention to Water Temperature:

If you’re using an espresso machine, ensure the water is at the correct temperature for optimal flavor extraction from your beans.

Too hot and your coffee will be bitter; too cold and it won’t have enough flavor.

10. Using Too Much Coffee:

It can be tempting to use more grounds than necessary to bump up the strength of your brew. This can also result in a bitter cup of joe.

Stick with the recommended measurements for optimal taste and aroma.

11. Using Too Much Water:

Ensure you use the right amount of water for your beverage if you want great-tasting coffee.

Why Does Coffee Smell Like Poop

If you don’t pay attention, it’s easy for the liquid to become over-diluted. It can result in weak and tasteless coffee.

12. Reheating Your Coffee:

Leftover coffee can be tasty the next day if stored correctly. Reheating it will cause it to lose its flavor and become bitter.

If you’re looking for a quick coffee fix, brew yourself a fresh cup.

Following these tips can help prevent common errors when brewing coffee. Remember them the next time you fire up your coffee maker.

With a little extra effort, you can ensure that your morning cup of joe will have the perfect flavor every time.


Coffee is usually associated with a pleasant and inviting aroma that draws people in. It may surprise you to learn that, for some, coffee can actually smell like poop.

This phenomenon often occurs when the beans used to make coffee are over-roasted. The roasting process causes certain compounds in the beans to break down.

They release sulfuric acid and create an odor that resembles feces.

While this smell won’t be present in all coffees, those who experience it may want to look for lighter roast options instead.

The good news is, even if yours does smell a bit off, you can still enjoy that delicious cup of joe.

After all, as they say: “It’s what’s on the inside that counts.” So don’t worry if your coffee smells a bit off, enjoy the flavor and move on.

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