It’s normal for oat milk separate in coffee, but why does this happen? And what can you do to prevent it?

Got yourself an alternative milk like oat, almond milk or coconut and feeling good about it? Well, before you get too happy be sure to educate yourself on a few drawbacks for some of these products: namely that many alternative milks don’t mix well with coffee. If you thought staying away from dairy was the way to achieve perfectly creamy coffee, think again!
By understanding why your oat milk separates in coffee and learning better alternatives that won’t leave you with lumps of curdled dairy-free mystery substance at the bottom of your cup, then you can make informed purchasing decisions while still having a luxuriously smooth cup every single time.
What is Separates?
Before delving into why oat milk separates in coffee, let’s start by understanding what the term “separates” means
Separates is the process of separating solid particles such as proteins, fats and other substances from liquid. This can be done through a variety of methods including centrifugation, filtration and decantation. Separates can also involve different temperature processes such as heating or cooling the solution to break down fatty acids into smaller components.
What is Curdling?
Curdling is the process of coagulating a liquid, usually milk, to form a semi-solid material. This process can be accomplished through exposure to acid or heat, with natural enzymes acting as catalysts. The coagulated material that forms after curdling is called the curd. Curdling is often used in cheese-making and other food preparation processes.
So, is separation different from curdling? Yes, although both processes involve the separation or coagulation of solid particles from a liquid, the actual process happens differently. Separates will use centrifugation, filtration and decantation to separate out solids while curdling involves using heat or acid to coagulate the liquid. Additionally, while separates is often used in industrial applications, curdling is most commonly associated with food preparation processes such as cheese-making.
Does Oat Milk Curdle in Coffee?
Yes, oat milk can curdle in coffee. This is because the proteins in oat milk react with the acidity of the coffee, which causes it to coagulate and form a semi-solid material. To avoid this, you can opt for low-acid coffees or use a creamer that won’t curdle in coffee. Additionally, you can also add a small amount of baking soda to your coffee as this helps minimize the acidity and curdling.

Why Oat Milk Curdle in Coffee?
Oat milk curdles in coffee because the proteins in oat milk react with the acidity of the coffee. This causes them to coagulate and form a semi-solid material, similar to what happens when making cheese. Additionally, oat milk is naturally higher in carbohydrates than other plant-based milks, which also makes it more likely to curdle.
This is why it’s important to use a low-acid coffee or other creamer when using oat milk in your coffee, as this will help reduce the chances of curdling. Additionally, adding a small amount of baking soda to your coffee can also help minimize the acidity and prevent curdling. Overall, oat milk is a delicious and creamy plant-based milk that can be used in coffee, just make sure to take the necessary precautions to avoid curdling.
Does Oat Milk Separates in Coffee?
The answer to the question “Does Oat Milk Separates in Coffee?” is Oat milk can sometimes separate in coffee due to its chemical properties. Oat milk is made by blending water and oats, which creates a mixture of carbohydrates, fats, and proteins. When this mixture is added to hot coffee, the heat can cause the proteins to denature and the fats to separate, leading to a separation of the liquid.
However, some brands of oat milk have added stabilizers, such as carrageenan or xanthan gum, which can help prevent separation in coffee. Additionally, properly steaming and frothing oat milk can also help prevent separation.
If you are experiencing separation with your oat milk in coffee, you can try stirring the coffee or using a milk frother to blend the milk back together. Alternatively, you can try a different brand of oat milk with added stabilizers or experiment with different brewing methods to see if they produce better results.

What is emulsification and how is it related to oat milk separation?
Emulsification is the process of combining two liquids that normally don’t mix, such as oil and water. This is achieved by adding an emulsifier, which helps to suspend the molecules of one liquid in another.
Oat milk is an example of a naturally occurring emulsion. The proteins in oat milk help to suspend the small droplets of fat in water, creating an emulsion that is stable and won’t separate. This means that oat milk will not separate when added to coffee, although it may still curdle due to the proteins reacting with the acidity of the coffee. To avoid this, you can opt for low-acid coffees or use a creamer that won’t curdle in coffee. Additionally, you can also add a small amount of baking soda to your coffee as this helps minimize the acidity and curdling.
Factors influencing oat milk separates in coffee?
The factors that influence oat milk separation in coffee are the acidity of the coffee, the proteins in the oat milk, and any additional ingredients added to the coffee.
Coffee pH level: Oat milk contains proteins that will react with the acidity of the coffee and cause it to curdle. Low-acid coffees or other creamers that won’t curdle in coffee can be used to reduce the risk of this happening. Additionally, adding a small amount of baking soda to your coffee can also help minimize the acidity and prevent curdling.
Sweetener: any additional ingredients added to coffee such as sweeteners or flavors may also influence oat milk separation. Sweeteners such as sugar or honey can increase the viscosity of the coffee and help prevent curdling, while flavors such as flavored syrups may also interfere with oat milk proteins and reduce the risk of curdling. Overall, oat milk is a delicious and creamy plant-based milk that can be used in coffee, just make sure to take the necessary precautions to avoid curdling.
Coffee temperature: Another factor that can influence oat milk separation in coffee is the temperature of the coffee. Hotter coffees are more likely to cause curdling due to the increased acidity and reaction rate of proteins with other components. To avoid this, you should allow your cold brew or iced coffee to cool down before adding oat milk, as the cooler temperature will reduce the risk of curdling.
Brew time: The amount of time you brew your coffee can also affect the separation of oat milk. Brewing for a longer period of time will extract more solids from the beans, increasing the acidity and making it harder to suspend the proteins in the oat milk. You should aim to brew your coffee for a shorter period of time if you are using oat milk to reduce the risk of separation.
Why does plant-based milk Separate in hot coffee?
Just like the factors that impact oat milk separates in coffee, Plant-based milks such as oat milk are made up of proteins, fats and water. When heated, the proteins in these plant-based milks can coagulate and form clumps that separate from the rest of the liquid. This is why plant-based milks separate in hot coffee – the proteins react with other components in the coffee and cause it to curdle.
How do you stop plant-based milk from Separate in coffee?
To avoid this, you should:
– Use Organic No Acid or Low Acid Coffee Beans: Look for organic, no acid or low-acid coffee beans as they are less likely to react with the proteins in oat milk and cause curdling.
– Use Lower Brew Temperature: Brewing at a lower temperature can help reduce the risk of separation since fewer solids will be extracted from the beans.
– Add Baking Soda: Adding a small amount of baking soda to your coffee can also help minimize the acidity and reduce the risk of separation.
– Use Sweeteners: sweeteners such as sugar or honey may also help increase the viscosity of the coffee and keep oat milk suspended, while flavored syrups can interfere with oat milk proteins and reduce the risk of curdling.
– Allow Coffee to Cool: Hotter coffees are more likely to cause separation due to their increased acidity and reaction rate, so allow your coffee to cool down before adding oat milk.
– Reduce Brew Time: Brewing for a longer period of time will extract more solids from the beans and increase the acidity, so reduce your brewing time if you are using oat milk.
How do you make almond milk coffee without Separate?
- Start by grinding organic, no acid or low-acid coffee beans.
- Fill a french press with the ground coffee and pour in 200ml of filtered water at a temperature of 92°C (198°F).
- Stir the mixture and cover it with the plunger, then leave to brew for 3 minutes.
- Once the coffee has finished brewing, slowly push down the plunger to separate the grounds from the liquid.
- Pour 200ml of almond milk into a small saucepan and heat it on low until it comes to a simmer, then turn off the heat and set aside.
- Take two mugs and fill each with 75ml of the almond milk.
- Pour in the brewed coffee and stir gently until combined.
- Serve with a sprinkle of cinnamon or nutmeg on top and enjoy!
By following these steps you can make delicious almond milk coffee without any separation occurring, allowing you to savor the flavor of your freshly-brewed cup of joe!
FAQs:
Q: Is it Okay to Drink Curdled Oat Milk?
No, it is not safe to drink curdled oat milk as the proteins have already reacted with other components in the coffee and may be unsafe for consumption.
Q: Is it Okay to Drink Separate Oat Milk?
Yes, it is safe to drink oat milk that has separated in hot coffee as long as it hasn’t curdled. Separated oat milk will still taste good and can be enjoyed without any health concerns.
Q: Can you put Oat milk in coffee?
Yes, oat milk can be used in coffee and it is a great plant-based alternative to dairy milk. However, you should follow the tips outlined above to reduce the risk of separation occurring.
Q: Is it normal for Oat milk to separate in coffee?
Yes, it is normal for oat milk to separate in hot coffee as the proteins in the milk can coagulate when heated. To reduce this effect and create a smoother cup of coffee, follow the tips outlined above.
Q: What does Oat milk taste like in coffee?
Oat milk has a creamy, slightly sweet flavor which pairs well with coffee. It also adds a nice foamy layer of foam to your cup of joe!
Q: Does Oat milk separate in tea?
Yes, oat milk can separate in hot tea just like it does with coffee. To reduce this effect, follow the same tips outlined above for making a smooth cup of tea with oat milk.
Q: How do you stop Oat milk from separating in tea?
To reduce the risk of oat milk separating in hot tea, follow the same tips outlined above for making coffee. Use a lower brew temperature, add baking soda or sweeteners, allow the tea to cool down before adding oat milk and reduce your brewing time if you are using oat milk.
Q: What are some ways to use Oat milk beyond coffee?
Oat milk can be used in a variety of ways beyond coffee, such as in smoothies, oatmeal and overnight oats, soups and sauces, baked goods and other plant-based recipes. It is also great for making vegan cream sauces or dairy-free ice cream!
Conclusion
Oat milk is a great plant-based alternative to dairy milk, but it can Oat milk separates in coffee or hot tea. To reduce this effect and make a smoother cup of joe with oat milk, be sure to use organic no acid or low-acid beans, lower your brewing temperature, add baking soda or sweeteners if desired, allow the brew to cool down before adding oat milk, and reduce your brewing time if you are using oat milk. Oat milk can also be used in a variety of other recipes beyond coffee, so feel free to experiment with it in your kitchen!