How Long Can Oat Milk Sit Out? (Explained!)

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Oat Milk has recently become almost as popular as the traditional milk that we obtain from cows due to the growing number of individuals who are becoming more worried about the state of our environment on a daily basis. Oat milk is so common these days that almost everyone, even your grandmother, is likely familiar with the product.

Having said that, though, it does not indicate that a great number of individuals are really knowledgeable about it. On the contrary, the great majority of people still do not comprehend how oat milk is produced, nor are they aware of the answer to this essential question:

How long can oat milk sit out? As the official safety guidelines by USDA say, an opened container of oat milk cannot sit out for more than two hours. The reason is that bacteria grow exceptionally fast at temperatures between 40 °F – 140 °F, which means drinking oat milk left out for longer than two hours might very likely be dangerous.

You should be good to go now that you’ve got the solution, right? Well, not really, since even if this subject is quite complex, there is still a great deal of information that can be shared about it. But have no fear; all you need information-wise will be revealed to you here in this post.

Hence, let’s not squander any more time and get started right now!

However, since opening it destroys the container, opened oat milk must always be refrigerated because it cannot be kept out of the fridge for more than two hours, regardless of its kind.

Although while there are certain circumstances in which oat milk does not need to be refrigerated, the vast majority of the time, you will still need to store it in the refrigerator. Oat milk that is sold in containers that are hermetically sealed may be kept even outside of the refrigerator, while the remainder of the product must always be refrigerated.

Also, when you have opened your oat milk, you must always place it in the refrigerator, regardless of the kind you have purchased. This is because once the sealing has been broken, it is no longer able to perform its duty properly, which means that the oat milk must now be refrigerated.

How long may unopened oat milk be stored?

You won’t believe it, but shelf-stable oat milk (the kind that comes in packaging that is airtight and sealed) may sometimes be left untouched for as long as a few months and still be perfectly OK to drink. To put it more simply, shelf-stable oat milk is, in fact, shelf-stable, and as a result, you do not need to be concerned about the need of refrigerating it.

On the other hand, there is also oat milk that cannot be stored on its own for an extended period of time. Thus, you should always keep this one in the refrigerator, since the USDA states that chilled oat milk must be left out at room temperature for more than two hours if you want to be sure that it is safe to consume.

How long may oat milk be left out once it has been opened?

No perishable food should ever be left out for more than two hours, as recommended by the United States Department of Agriculture, if you want to be absolutely certain that it is not contaminated and can be consumed safely. Oat milk should thus not be left out for more than two hours after it has been opened.

Is oat milk still edible if the oats are removed?

Since the great majority of oat milk is sold in containers that are hermetically sealed against air, oat milk may often be left out at room temperature without going bad. Nevertheless, there are varieties of oat milk that must be kept in the refrigerator; if they are left out for more than two hours, they lose their viability and cannot be consumed.

After you open a pack of oat milk, regardless of the kind, you must always keep it in the refrigerator. This is because an opened pack of oat milk will no longer be usable if it is kept at room temperature for an extended period of time.

Is it OK to leave oat milk out overnight?

As oat milk is often marketed in containers that are airtight and sealed, it typically does not need to be stored in the refrigerator at all; thus, leaving it out at room temperature for the night is not an issue.

Nevertheless, bearing this in mind, we feel obligated to point you that some varieties of oat milk should, on the other hand, be stored in the refrigerator at all times. In addition, it is possible to contaminate the oat milk by making it unsafe to consume if you leave it out for a whole day.

In addition to this, any form of oat milk that has been opened must be stored in the refrigerator after it has been used. This is because oat milk may go bad in as little as two hours if it is left out at room temperature after it has been opened. Because of this, a package of oat milk that has already been opened cannot be kept out overnight.

How long can you leave oat milk in coffee?

According to the USDA, the maximum amount of time that perishable food, such as oat milk, may remain out before being dangerous to consume is two hours. If you leave your oat milk out for a longer period of time, there is a good potential that it may get contaminated with bacteria and become unsafe to consume. Bacteria grow quite fast when the temperature is around room temperature.

And this holds true even for the oat milk that was added to the coffee; hence, if you want to be absolutely certain that the coffee is not contaminated in any way, the oat milk may only sit out in the coffee for a maximum of two hours.

How can you tell if your oat milk has gone bad?

If you can identify the difference between excellent and terrible oat milk, you have accomplished one of the easiest jobs there are. If you want to know whether the oat milk you bought has gone bad, all you have to do is give it a good look, a good scent, and most conveniently, to taste a little amount of it.

If you noticed anything strange, whether it was a flavor, a smell, or both, the oat milk has already gone bad; if none of these things occurred, the milk is still fine to drink. That sums things up well, wouldn’t you say?

How does terrible oat milk taste?

Having said that, it’s possible that you’re not quite clear on the definition of the word “strange.” How does spoiled oat milk really smell and taste? Check the milk for acidity; spoiled oat milk has a flavor that is much, much more sour than it would usually have, and you should get rid of it as quickly as possible if it is acidic.

How does nasty oat milk smell?

And the scent is almost exactly the same because spoiled oat milk develops a strange odor that is quite similar to the way it tastes. This is because oat milk is made from oats. However, oat milk has a scent that is merely acrid and sour, rather than the typical aroma of sweet almonds.

How do you store oat milk?

Since they are hermetically sealed against air and moisture, many varieties of oat milk do not need to be refrigerated before being opened. This was covered in the previous section. When considering how to best keep your oat milk, airtight containers with secure lids seem to be the optimal option.

To ensure that your oat milk stays as fresh as possible, you should first store it in containers that are hermetically sealed and airtight (if it already is, you can skip this part). Following that, store the milk in the refrigerator to ensure that it has a longer shelf life.

What happens when you drink rotten oat milk?

If you consume oat milk that has already gone bad, this might potentially hurt you in the same way that it could harm pretty much any other meal. If you drank tainted oat milk, it is possible that you would have some of the more common signs and symptoms of food poisoning, such as vomiting and diarrhea.


Since oat milk is often supplied in containers that are hermetically sealed against air, the beverage does not need to be refrigerated before being opened. However, if you purchased your oat milk from the refrigerator section, it will not be able to maintain its quality on its own. This type of oat milk can only be left out at room temperature for a maximum of two hours before becoming unsafe to consume; therefore, you will need to store it in the refrigerator at all times.

The same holds true for oat milk that has already been opened; since doing so destroys the seal on the container, opened oat milk must be stored in the refrigerator at all times. Moreover, regardless of the variety, oat milk cannot be kept at room temperature for longer than two hours.

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Can oat milk be unrefrigerated?

To address your question in a nutshell: no, you do not always have to keep your oat milk in the refrigerator. You can keep Willa’s Oat Milk in your cupboard until it is opened since the package has a hermetic seal that prevents air from getting in. This makes the product shelf-stable. When the milk container has been broken open, it should be stored in the refrigerator and consumed within seven to ten days at the most.

How long can oat milk sit?

How long does it take for oat milk to go bad? Oat milk purchased from a retail outlet may be refrigerated for about one to two weeks, consumed for approximately five to seven days after the expiry date that is marked on the container, and frozen for up to six months. According to Tamayo, “shelf-stable oat milk may keep unopened for at least six months,” and perhaps even longer.

How long does oat milk last unrefrigerated unopened?

The date on the label suggests that bottled oat milk has a shelf life of about nine months, however this is just a recommendation. Does oat milk expire? Oat milk that has not been opened may be kept risk-free for anywhere between three and five years if it is kept in a location that is dark, cold, and dry. When a container is properly sealed, there is no possibility of bacteria growth, mold growth, or food going bad.

What happens if you drank spoiled oat milk?

Oat milk does not have any preservatives in it, thus consuming it will not put you at risk of becoming sick. In spite of this, you should steer clear of drinking oat milk that has gone stale since it is likely to be contaminated with germs that may lead to food poisoning.

How can you tell if oat milk has gone bad?

To determine whether or not this is true, just test it by pouring a little amount of oat milk into a basin or the sink. It’s probably not good if it doesn’t have a smooth consistency and instead has bumps and an uneven texture as you’d expect it to have. Examine the color of the milk to determine whether or not it has become yellow. The color of spoiled oat milk, which is yellow, is much darker than the color of fresh oat milk.

Does oat milk contain bacteria?

According to the Food and Drug Administration, the company that makes Oatly and a number of other specialized beverages has issued a recall for 53 of its products due to the possibility of microbial contamination in those goods.

Can oat milk cause health problems?

It’s possible that drinking oat milk can give you adverse effects like bloating and flatulence. In addition, it is possible that it will interact negatively with the diabetic medicine that you are taking, which might result in a dangerously low blood sugar level.

Why is some oat milk refrigerated?

Earth’s Own claims that all of their chilled goods must be stored in the refrigerator at all times; otherwise, they will go bad very rapidly. Because of this, even though most plant-based milks have a somewhat extended shelf life, they still need to be used rather soon.

Does oat milk go bad if it gets warm?

How Long Will Oat Milk Keep If It Is Left Out? The United States Department of Agriculture recommends that you throw away any half-opened oat milk that has been left out at room temperature for more than two hours. This is the recommended maximum time frame for keeping perishable foods at room temperature, such as open oat milk, which is one of those foods.

Is oat milk hard on the gut?

Consuming foods that are high in beta-glucan has also been related to improved intestinal health, which is another reason why drinking oat milk is beneficial. The results of a research that was conducted in 2017 demonstrated that the presence of beta-glucan in oat milk did, in fact, have a beneficial effect on the gut health of the consumer. The researchers came to the conclusion that it boosted the metabolism of the gut in 26 healthy adults.