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You may be wondering, particularly if you like this nondairy milk, whether oat milk curdles. It certainly does! Oat milk, although not typical milk, may and often does curdle. So, why does this happen, and what can be done to prevent it? Those are excellent questions. Come along as we investigate the chemistry of curdled oat milk.

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Why Does Oat Milk Curdle?

When oat milk gets too heated or too acidic, it curdles.

Oat milk is made from oats that have been combined with water, filtered, and emulsified for a smoother texture. But, when exposed to acid or becomes too heated, this non-dairy milk may break down and curdle. This separation may sometimes be repaired by additional emulsifying (shaking, blending, or using an actual emulsifier).

Is Curdled Oat Milk Bad?

Curdled oat milk may be harmful, however it is not always.

For example, if your oat milk is curdling or separating, it might be that it is going to expire. If you’ve left your oat milk coffee creamer out for too long, or if it’s over its expiry date, you may need to replace it with fresher oat milk.

Curdled oat milk, on the other hand, isn’t always a negative thing in many cases. If you’re looking for aesthetic appeal, your coffee or whatever you’re putting your oat milk in may seem unappealing, but the taste will be the same.

The answer to whether or not curdled oat milk will hurt you is simple. Curdled oat milk will not hurt you unless the cause of the curdled oat milk is a loss of freshness.

Can You Drink Curdled Oat Milk?

Drinking curdled oat milk is entirely safe if your oat milk is fresh.

Nonetheless, the sight of curdled milk is enough to make many people lose their appetite. This is due to the fact that curdled milk is often linked with rotting. Nonetheless, curdled oat milk may arise for a variety of causes in this case. The majority of the causes have nothing to do with spoiling and instead have to do with the pH or temperature of the drink.

Should Oat Milk Have Bits in It?

Oat milk may certainly include particles.

Don’t be frightened if you discover what appear to be little white particles in your oat milk. These specks are sometimes not entirely mixed out and float in suspension in oat milk. You may be able to shake the carton occasionally to assist the specks disappear.

If shaking fails, the oat milk should still taste good and maintain its overall consistency. If it doesn’t, the oat milk was probably not fresh to begin with.

Should Oat Milk Have Chunks?

Oat milk may have lumps. They will be bigger than the unblended white specks stated above. You should not be concerned if you see them.

Recall that oat milk is prepared by mixing oats and water until creamy before filtering. Little particles, flakes, or pieces may sometimes be overlooked. This is a common occurrence and does not indicate that there is anything wrong with your oat milk.

Oat Milk Separating in Coffee

Some individuals remark that oat milk separates in their coffee. Some people are completely unaware of this.

The discrepancy is most likely due to the brand of oat milk utilized. Different companies use various chemicals and emulsifying procedures. Some oat milk types are even engineered to handle greater heat temperatures and acidity. This makes them more appropriate for use in coffee shops. Oatly, Arpo, and other barista-focused companies are excellent examples of these oat milks.

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Oat Milk Curdling Questions

Does Oat Milk Curdle in Your Stomach?

Oat milk has the potential to curdle in your stomach.

Since the stomach is a very acidic environment, oat milk may curdle before being absorbed.

Having said that, your body will most likely tolerate oat milk better than cow’s milk, particularly if you already have an upset stomach. Milk in the stomach may cause gastrointestinal troubles in some people, but not in others.

Does Oat Milk Curdle When Heated?

When oat milk reaches specific temperatures, it may curdle or separate. Nevertheless, this is not true of all oat milks.

As previously stated, certain oat milks are designed to endure higher temperatures while retaining smoothness when exposed to acidic coffee. Some brands may not be this way, so if you want to boil oat milk, you can expect some curdling, but this is not always the case.

Does Oat Milk Curdle When Boiled?

When boiling, oat milk may curdle or separate, although this depends on the kind of oat milk you use.

Oat milk designed for baristas may not curdle or separate, although regular oat milk may be heat resistant as well. Please keep in mind that boiling oat milk might affect its consistency; some people have reported that their oat milk gets sticky after reaching certain degrees.

Note: When producing oat milk at home, there are steps you can take to prevent it from getting too slimy. Check out this video to discover how to create great oat milk every time you make it.

Does Oat Milk Curdle In…

Does Oat Milk Curdle in Coffee?

Oat milk does not usually curdle in coffee, but it may. If you find your oat milk curdling when creating a cappuccino or iced coffee, it is most likely due to a chemical interaction between your oat milk and coffee. The oat milk may curdle due to the greater amounts of acidity and maybe the heat of the coffee. This is particularly true if you have hot coffee and cold oat milk.

To avoid this, try warming your oat milk and gently adding hot coffee to your previously poured oat milk. This will help to temper the oat milk so that it does not respond badly to the temperature differential.

If your oat milk continues to curdle after this, consider a darker coffee roast, since medium and lighter roasts may contain more acid. Cold brews have less acid.

Does Oat Milk Curdle in Coffee If It’s Expired?

When oat milk is exposed to coffee, it is more likely to separate or curdle if it is old or near to expiry. As a result, it is preferable to use fresh oat milk, particularly if you are concerned about the appearance of your coffee.

Of course, to determine if your oat milk is fresh, check the expiration date on the package and take note of any changes in color, smell, or consistency.

If you make your own oat milk, it will usually last around five days.

Although many people use oat milk as a nondairy substitute for milk in coffee, it has numerous additional applications. Check out the commonly asked questions about oat milk curdling to learn more about how oat milk compares to other liquids and drinks.

Does Oat Milk Curdle in Tea?

Tea with oat milk may curdle. Nonetheless, it is crucial to note that most teas are not as acidic as coffee, and that the pH of each tea varies. As a result, although oat milk curdling is less probable in tea than it is in acidic coffee, it may still occur.

Not only that, but the warmth of your tea may influence whether or not your oat milk separates. Warm your milk first before adding it to your tea to reduce the possibility of curdling and separation.

Does Oat Milk Curdle With Lemon?

Since lemon has a pH of roughly 2 (thus the sour flavor), you can sure your oat milk will curdle when paired with lemon. When more acidic fruits, such as strawberries, are added, you may witness curdling or separation.

Keep in mind that if you use your oat milk to cook or bake, it may not matter whether it separates and curdles. To make dairy-free buttermilk, many people add lemon juice to plant-based beverages. Some prefer to steep strawberries in oat milk to produce lactose-free strawberry porridge. In any case, the curdling and separation will be insignificant after the liquid has been boiled and distributed throughout the dish.

Does Oat Milk Curdle With Alcohol?

Indeed, oat milk may curdle when exposed to alcohol.

According to the Arrhenius Definition of bases and acids, alcohol is neither acidic nor basic. Even yet, when coupled with alcohol, oat milk will curdle similarly to ordinary milk. But, as previously said, this may not have a significant impact on what you are preparing.

If you are mixing alcohol and oat milk for drinking reasons, you may need to emulsify the drink or just accept the curdled appearance of the drink!

Does Oat Milk Curdle With Vinegar?

Oat milk may curdle when exposed to vinegar, although not always. It will depend on the amount of vinegar used, how long it rests, the brand of oat milk used, and the freshness of the oat milk itself.

How Do You Keep Oat Milk From Curdling?

Now that you know why oat milk curdles, it’s time to figure out how to prevent it from occurring in the first place.

Try the following recommendations to protect your oat milk from curdling:

  1. Know Your Brand: Starting with the appropriate sort of oat milk might assist you avoid curdling oat milk. Instead of using ordinary oat milk, try using barista brands. They have been particularly prepared to resist certain circumstances and may be more suitable for your requirements.
  2. Warm the Milk First: When cold oat milk is joined with anything hot, it might curdle due to the abrupt shift in temperature. Warm your oat milk carefully before adding it to a hot beverage or drink. Boiling oat milk may cause it to lose its consistency.
  3. Add the Coffee to the Milk: If using oat milk for coffee, try gently warming the oat milk before adding the coffee, rather than the other way around. This will moderate the oat milk and prevent it from curdling better than just adding cold oat milk to a hot cup of coffee.
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Does Oat Milk Curdle? Yes, It Does!

Is it true that oat milk curdles? It most certainly does!

Oat milk curdles similarly to ordinary milk, although it is unlikely to cause harm. Some oat milks curdle because they aren’t fresh, but most oat milks curdle when they are exposed to anything acidic.

When this occurs, you may shake, swirl, or combine the mixture to re-emulsify everything. However, curdled oat milk, although unsightly, is unlikely to harm you in the long run.


Why does oat milk curdle in coffee?

Oat milk curdles in coffee, generally as a result of the coffee’s acidity. Instead, consider getting darker-roasted coffee or adding oat milk to cold brew. These coffees are often lower in acidity. However, you may try warming your oat milk before adding it to your coffee to see if it makes a difference.

Is curdled oat milk bad?

Curdled oat milk may be harmful, however it is not always.

Can I drink curdled out milk?

Drinking curdled oat milk is entirely safe if your oat milk is fresh.


How do you know if oat milk is curdled?

Shake the container well (as you should always do before using oat milk) and pour some into a glass. If it seems weird (i.e., congealed or separated), it has most likely ruined.

What causes oat milk to curdle?

Oat milk has a pH of 6.7 to 6.9; if the acidity rises, the milk will curdle. This is analogous to how lactic acid causes curdling in dairy milk. When oat milk is placed in an acidic environment, such as a cup of coffee, it might circle.

How long does it take for oat milk to curdle?

If the recipe also asks for baking soda, almond milk and oat milk are OK to use since the acids will react during baking. When using almond or oat milk, let up to 10 minutes for the milk to curdle. It takes roughly 3-5 minutes to transform soy milk into buttermilk.

Is oat milk supposed to separate?

With oat milk and many other dairy-free milks, separation is quite typical. Just shake before using!

Is it OK if oat milk is chunky?

“A foul odor, a yellowish tint to the hue, and a clumpy or thick texture are all signs of rotten oat milk.” Even if the oat milk hasn’t passed its best-by date, if you smell or see any of these indicators, it’s time to throw it out.

Is it normal for oat milk to be clumpy?

As oat milk spoils, it becomes chunky and thicker in texture. Pour a little amount of oat milk into the sink or a bowl to test this. It’s probably terrible if it’s lumpy and has an uneven texture rather of being smooth.

How do you make oat milk that doesn’t split?

Don’t over-blend your oat milk: 1 minute is adequate, and 30 seconds in high-powered blenders may be plenty. Drain the oat milk twice, once into a clean (or rinsed) container and once into a clean (or rinsed) container. Soaking oats before mixing will result in more slime. To keep, add ice cubes while mixing.

What is the best milk alternative for coffee that doesn’t curdle?

Pea milk is less prone to curdle in coffee, but we suggest warming it beforehand to avoid the possibility of lumps. If you want to foam, look for high protein milks like pea, hemp, or soy.

Why did my oat milk get thick?

The starches in oats thicken when heated, exactly as when you prepare oatmeal. The heat from the friction in your blender causes oat milk to become slimy. The secret to avoiding sticky oat milk is to keep the components cool.

How long should oat milk be open for?

You may extend its life by storing it in an airtight container. “As long as your kitchen or home isn’t too hot,” Tamayo explains, “your shelf-stable milk should survive months, if not a whole year.” After opened, store it in the refrigerator and use within 1-2 weeks.

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