Why is there white stuff in my coffee?

In this brief guide, we will discuss the following question, “why is there white stuff in my coffee?”, what is coffee chaff, how to remove it from your coffee, and other queries related to this topic.

Why is there white stuff in my coffee? 

The main reason why you see white stuff in your coffee is the coffee chaff coming from grinded coffee beans. Moreover, coffee chaff can not be seen in brewed coffee because it has been filtered, hence if you use freshly home-grounded coffee beans you are most likely to see this white stuff.

However, if you prepared your coffee by only adding water and coffee to a cup and you did not notice any white stuff on the top and then after adding the milk or the creamer white stuff appears, that means your milk or creamer is bad.

Furthermore, you can notice that your milk or your cream is bad if they have a bad smell. Also, if you do not mix your creamer well with water it might clump leaving white stuff on the top of your coffee. Moreover, if the water is not hot enough it can not dissolve the fat in your creamer.

What is coffee bean chaff?

The coffee chaff is the external dry skin of the coffee beans, it is also known as the husk and silverskin. It comes off after roasting the coffee beans, so it is the by-product of the roasting process. However, the majority of the coffee chaff is removed during the roasting process, but few of them can not be removed and you will notice their presence once you grind the coffee.

Coffee beans are collected when they are still green, so when the coffee chaff is still attached to the bean. Hence, during the roasting process, the temperature will be high enough to dehydrate and roast the bean, then the outer skin will fall.

Is coffee chaff bad?

No, coffee chaff is not bad. This by-product is not harmful to your health and also it will not affect the taste of your coffee because this skin is tasteless. However, the chaff might absorb a small amount of the oil present in the coffee but it will not affect the taste after all. Furthermore, the coffee chaff is considered a good soil fertilizer and food for chickens and pets.

Moreover, coffee chaff might cause a fire hazard for the manufacturers during the roasting process and the reason is the high temperature used during the procedure. Also, on the household level, despite being very lightweight, the coffee chaff is considered a waste and can take time to be removed and cleaned from your grinding machine.

How do you separate coffee beans and their chaff?

To separate the chaff from coffee beans, take two colanders and place the already roasted coffee beans in one and put the other one on the top and start shaking. You need to do it several times, and after that, the chaff will be separated from the beans. Hence, make sure that your coffee beans are still hot so that method can work.

After separating the chaff from the beans you can bring a fan and place the colander or the bowl in front of it. Like that the air will remove the thin skin. Also, you might notice that not all the chaff is removed and it is fine because you can not remove all of them. 

Furthermore, if you like to roast your coffee at home consider buying an air roaster that will facilitate the roasting process and the removal of the chaff. However, if you buy already grounded coffee you reduce the risk of having coffee chaff in your drink.

Moreover, try to roast a small quantity each time. It might not be very convenient but in this way, you will increase your chance of removing all the chaff and will keep your coffee fresh and full of taste. In addition, make sure you preserve your grounded coffee in a well-sealed container to keep it fresh for a longer time.

Is it fine to drink curdled cream in coffee?

Yes, it is fine to drink a coffee that has curdled cream as long as you are sure that the creamer or the milk added is not spoiled. The reason why creamers or milk curdle in the coffee is due to temperature differences when you pour cold milk into hot coffee. One extra reason is the acidity of the coffee which can lead to cream curdling.

However, you might notice that sometimes the milk curdles and sometimes it does not and it is because the coffee is not too hot.

Other FAQs about Coffee that you may be interested in.

Why is coffee so bitter?

Why is coffee so expensive?

Why drink decaf coffee?


In this brief guide, we discussed the following question, “why is there white stuff in my coffee?”, what is coffee chaff, how to remove it from your coffee, and other queries related to this topic.


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