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How Long Does Oatmeal Last? [Shelf Life Guide]

Oatmeal is prepared by stripping the outer layer of oat grains. Oatmeal is of two types Ground oats and Steel-cut oats.

Oats are very beneficial for health, and people generally consume oatmeal as a breakfast mix with water or milk, adding a small amount of sugar.

Oats are an essential ingredient in the preparation of many kinds of cereal. Oats are used as an item in the preparation of granola.

Oatmeal pancake made with cornmeal and quinoa is also a popular breakfast item.

Oats are highly fibrous and nutritious. Oats also contain a plant build compound known as Polyphenol that includes a high level of avenanthramide antioxidant.

This antioxidant helps to improve blood flow and reduce itching and inflammation.

Oatmeal is a popular choice of breakfast for many people, but have you ever wondered how long does oatmeal last?

Let’s take a look at if oatmeal goes bad and how long it can last.

Does Oatmeal Go Bad? How Long Does Oatmeal Last?


Anything edible tends to go bad if not stored properly. Un-cooked oatmeal turns out to have a longer shelf life, which means if oatmeal is stored correctly, it can last for some years.

Make sure the oatmeal is stored in an airtight container and kept in a dry and cool environment.

However, the quality of oatmeal will reduce over the years, which will result in a change of flavor. The shelf life of oatmeal differs from how it is stored or its packaging.

In the case of cooked oatmeal, if stored in the refrigerator will last for about 4-6 days.

Since lower temperature prevents or slows the growth of harmful micro-organisms. If you leave the oatmeal open in the room temperature without storing it in the refrigerator, bacteria will start growing within a few hours.

If you want to further maximize the storage of cooked oatmeal, transfer it to an airtight container and freeze it.

Freezing extends the shelf life of cooked oatmeal for at least 2 to 3 months.

However, there is absolute oatmeal that comes with added flavors like fruits and nuts. This type of flavored oatmeal tends to go bad sooner than plain oatmeal.

Flavored oatmeal, if stored in a cool and dry place, can last for at least six to nine months.

Oatmeal is also manufactured as seamed and un-steamed. Un-steamed oatmeal tends to go bad faster because the oil contained in the oatmeal makes it prone to spoilage. 

So if you purchase un-steamed oatmeal, make sure to store it in the refrigerator. That way, the oatmeal will last for a year.

How to Tell if Oatmeal is Bad? Oatmeal Shelf Life!


Although oatmeal does not get rancid fast, there are still chances oatmeal can go bad if not properly stored.

Do not expose oatmeal to water or heat as it will go rancid quickly. As molds grow where there is moisture. Here are ways to help you decide if your oatmeal has gone bad:

If you notice molds developing on the surface of the oatmeal, it’s a sure sign that your oatmeal has gone wrong. Fungi produce mycotoxins, which are cancer-causing agents.

Another way to find out if your oatmeal has gone bad is by taking a sniff. If you don’t see any molds developing yet, you doubt that your oatmeal had gone bad smell it. And if it has an off smell nothing like the oats, then it is a sign of spoilage.

You can also check by cooking your oatmeal. While preparing, you will notice that the oatmeal has been separated from the water. Once cooked, oatmeal will develop molds because of the moisture contained. This way, you can check if your Oatmeal has gone bad.


Does Oatmeal Go Bad? How Long Does Oatmeal Last?

5 from 1 vote
Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Course Shelf Life
Servings 1 Serving


  • Oatmeal
  • Air-tight containers or Ziplock bags
  • Labels and markers


  • Read the guide thoroughly to learn how long it lasts.
  • Label your container with the content and date and keep track of how much youu0026#x27;re using!
  • Make sure to store in an airtight container in a cool, dark place (pantry or fridge).
  • If frozen, thaw in the fridge before use. Always check for signs of spoilage before using.
Did you make this recipe?Mention @EatDelights or tag #eatdelights!

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