Does Oatmeal Expire? Dried, Cooked, and More (2024)

Oatmeal is one of the most nutritious and versatile whole grains on the market.

Loaded with fiber and essential vitamins and minerals, oatmeal is a mainstay in household pantries around the world (1).

Whether you fancy using it as a hot breakfast cereal, base for savory and comforting porridge, or want to add texture and fiber to baked goods, there’s no denying that keeping oatmeal on hand is a good idea.

However, if you haven’t used your oatmeal for anything more than a cupboard accessory in a while, you may wonder when it’s time to throw it out.

This article reviews the shelf life of oatmeal and how to know when your stash is ready for a refresh.

Oatmeal has a fairly long lifespan compared with many other foods.

Yet, its precise shelf life can vary dramatically depending on how it was processed, whether it has been cooked, whether any perishable ingredients have been added to it, and the storing method.

Similarly to dried rice or pasta, commercially processed and uncooked rolled, quick, or steel cut oats will typically last at least 12 months — and up to 2 years if the package remains unopened or the oats are stored in an air-tight container (2).

Commercially processed oats usually undergo a steaming process, which contributes to their long shelf life (1).

Unstabilized oats are oats that have not been steamed during processing, and therefore, have a reduced shelf life of about 3–4 months.

Oatmeal that contains other kinds of ingredients like dry milk or fruit can last anywhere from 4 months to 1 year, depending on the type of added ingredients and how it’s stored (3).

If you’re unsure, check the package label for a “best by” or “use by” date.

Similarly to soups and stews, previously cooked or prepared oatmeal shouldn’t be kept longer than about 3–4 days before you toss it. However, if you freeze it, it can be kept safely for up to 3 months (2, 4).

Summary

The shelf life of oatmeal can range from just a few days to up to 2 years depending on how it’s processed, stored, and prepared.

When stored properly, uncooked oatmeal isn’t considered a potentially hazardous food. This means it’s unlikely to spoil in such a way that’ll make you sick if you eat it once it’s past its prime.

That said, the quality of the oats will decline over time, and they may become stale, change color, or develop flavors that aren’t particularly palatable.

If dry oats are exposed to moisture while stored, they’ll be more susceptible to mold growth. If you see any type of mold growing on your oats — whether cooked or dry — do not eat them.

If you’re unsure whether your oats are still good, start by inspecting the color, texture, and scent. If you notice any dark spots, strange odors, or clumping, it’s probably best to throw them out or add them to the compost bin.

Summary

Check your oatmeal for mold or changes in scent, color, or texture to evaluate whether it’s safe to consume.

The trick to maximizing the shelf life of your oatmeal is the storage method.

For uncooked oats, you’ll want to make sure they stay as dry as possible. Minimizing exposure to light and oxygen can help, too.

Store them in a cool, dry place, such as a pantry or cupboard. After their original packaging has been opened, transfer them to a water- and air-tight container, such as a glass, stainless steel, or ceramic jar, to help keep them fresh.

When storing cooked oatmeal, opt for a container with a tight seal, and keep it refrigerated until you’re ready to eat. If you’re freezing it, make sure you store it in a container that’s air-tight to prevent freezer burn.

Summary

To maximize oatmeal’s shelf life, keep it in a cool, dry place with minimal exposure to moisture, air, and light.

Oatmeal is a nutritious pantry staple in households all over the world.

When kept dry, commercially processed oatmeal can last up to 1–2 years. However, the exact shelf life will vary depending on how it was processed, how you store it, whether it has been cooked, and whether any perishable ingredients have been added to it.

If you notice any mold or changes in the color or scent of the oatmeal, it’s best to throw it out.

You can maximize the shelf life of any type of oatmeal by keeping it away from excess moisture and oxygen exposure. Previously cooked oatmeal should always be stored in the refrigerator or freezer until you’re ready to eat it.

Does Oatmeal Expire? Dried, Cooked, and More (2024)

FAQs

Does oatmeal expire when cooked? ›

Similarly to soups and stews, previously cooked or prepared oatmeal shouldn't be kept longer than about 3–4 days before you toss it. However, if you freeze it, it can be kept safely for up to 3 months (2, 4).

Does dried oatmeal expire? ›

Bottom line. While dried oats will typically last for up to 2 years, instant and flavored oatmeals have a shorter life span (6 months to 2 years). Time can affect the quality and taste of oats, but factors such as moisture, oxygen, and light can speed up their decline.

What happens if I eat expired oatmeal? ›

If your oatmeal has been stored and kept properly, then there is no harm to consume it after the expiration date. If you have expired oatmeal, then you may notice some changes in their texture, color and flavor as well. As a result of freshness, you may lose some nutritional value of oatmeal.

Can you eat expired dried oatmeal? ›

Yes, you can absolutely eat oatmeal after it has expired. The 'best by' date on the label is only a manufacturer's recommendation, it is not a food safety guideline. If oatmeal has been properly stored in a cool, dry and dark area, then the risk of spoilage is minimal.

How do you store cooked oatmeal long term? ›

Cooked oatmeal can should be kept inside an airtight container and placed inside the fridge or freezer. When stored in the refrigerator, cooked oatmeal will last up to 5 days, and when kept in the freezer it can last as long as 3 months.

How quickly does oatmeal expire? ›

An unopened container of shelf-stable oat milk will stay fresh for six to 12 months, and at least two months (likely longer) past its date. An unopened carton of refrigerated oat milk, on the other hand, should be discarded if it's more than a week past the printed use by date.

What happens when you eat oatmeal everyday for a month? ›

No More Worrying about Calories

Now the scale looked a lot less menacing. A cup of oats delivered 4 grams of protein and 4 grams of fiber to help lower body weight, improve cholesterol levels and reduce the risk of type 2 diabetes. It also provided health-building minerals such as phosphorus and magnesium.

How do you store oatmeal for years? ›

#10 cans of rolled oats will store for up to 30 years if stored in a cool, dry location. Once opened rolled oats will stay fresh for about 6-9 months. The plastic buckets are also a good option for storing oats but shorten the shelf life to about 25 years when stored in a cool, dry place.

Can cooked oatmeal be dehydrated? ›

I decided to try dehydrating and then rehydrating pre-cooked oatmeal to explore this option for an upcoming trip. Pre-cooked steel cut oatmeal and fresh mango on dehydrator trays. It took about 12 hours in the dehydrator until the oatmeal became brittle. The mango was dry after 8 hours or so.

What is the best way to store dry oatmeal? ›

Unopened dry oatmeal should be stored in a cool, clean and dry place. Opened oatmeal ought to be stored tightly covered in a resealable plastic bag or in a plastic or glass container. It is best practice to use opened oatmeal within one year. Dry oatmeal can also be stored in a freezer bag in the freezer for one year.

How do you use expired oatmeal? ›

Run your oats through a processor into a fine powder and use to thicken your soups and stews and as a cooking substitute for breadcrumbs. If you are ever in a creative rut, you can mix oatmeal with all-purpose flour and water to make pliable modeling clay.

Does oatmeal get rancid? ›

This doesn't necessarily mean that the oats will go bad after the date, only that the product will no longer be at its optimal freshness following the date; Quaker Oats's website clarifies that "items beyond their recommended shelf life are safe to consume but may experience slight changes in flavor, color or ...

Why is my oat milk slimy? ›

Oat Milk FAQs

Over-blending can make the oat milk slimy in texture, which is why we recommend blending for about 30-45 seconds. Soaking your oats can also make the oats more prone to sliminess. Just add to the blender with water and blend!

Why you shouldn't eat oatmeal every day? ›

Though oatmeal is said to help you lose weight, having too much of it can lead to malnutrition and muscle mass shedding. This is because oatmeal is rich in fibre, which keeps you full for longer, so your body loses the ability to signal you to eat more throughout the day.

What happens if you eat eggs every day? ›

Eggs are also a great source of heart-healthy nutrients like potassium, folate and B vitamins. Some research suggests that up to two eggs per day actually improves heart health. As with anything, moderation is important, especially if you enjoy eggs daily.

What is the healthiest oatmeal? ›

Steel-cut oats, also called Irish oatmeal, are the whole oat kernel that has been cut into two or three pieces using steel disks. This type of oats contains the highest amount of fiber, as it is least processed. Steel-cut oats take a little longer to cook, and result in a creamy and chewy porridge.

How long does cooked oatmeal keep in the fridge? ›

Shelf Life Tips

To maximize the shelf life of cooked oatmeal, refrigerate in covered airtight containers or resealable plastic bags. Properly stored, cooked oatmeal will last for 4 to 6 days in the refrigerator.

Can leftover oatmeal be reheated? ›

The answer is yes–reheating baked oatmeal is fine. You can either warm oatmeal using a microwave or a stovetop after being properly stored in the fridge or the freezer. Reheating your favorite porridge in the microwave is faster and easier than the stovetop.

Can you refrigerate and reheat cooked oatmeal? ›

Yes, you can reheat oatmeal as long as it's been properly stored in the fridge, at a low temperature. When reheating your oatmeal make sure to add a bit of extra liquid, like milk or water or plant milk, and stir every now and then. Oatmeal will reheat wonderfully and turn out even creamier the next day.

Can I freeze cooked oatmeal? ›

Can you freeze cooked oatmeal? Yes, you can freeze oatmeal! Make your favorite oatmeal in a large batch at a time when you can actually pay attention to preventing boil over. Add your favorite toppings and freeze it all in muffin cups.

How long does oatmeal last in the pantry? ›

As a general rule of thumb, standard, packaged oatmeal can last up to two years in the pantry when stored appropriately. Oatmeal can go bad, but if stored correctly it has a decent shelf life and can be consumed far beyond the best before date.

Can you cook oatmeal and save it for later? ›

Tomorrow morning, pack up the oatmeal and stick it in the fridge. If you want to be really organized, you can divide your oatmeal into individual portions for the rest of the week. Good for you! But sometimes I just stick the whole pot in the fridge.

How many times can you reheat oats? ›

Leftover porridge can easily be reheated, it will thicken on standing so you will need to add a little extra liquid, (water or milk) and stir it well before reheating it in a pan or microwave. Cool quickly and store, covered, in a refrigerator for up to 2 days and only reheat once.

What is the best way to reheat oatmeal? ›

To serve, place 2-3 pucks of oatmeal into a microwave safe bowl and heat on high until warm (stir occasionally). You can add a splash of milk to keep it moist as it reheats.

What is the difference between oatmeal and porridge? ›

Porridge is a mixture of any grain, cereal, or legume boiled in water, milk, or broth. It is served hot and made from a variety of cereals such as oats, maize, rice, corn, wheat, and barley. Oatmeal is a type of porridge made from ground, rolled, or flattened oats.

Is it OK to microwave oatmeal? ›

No, it is not bad to microwave oatmeal. Reheating or even cooking oatmeal in the microwave is a completely safe way to prepare oats to reach the desired consistency.

Can you eat cold oats? ›

A popular breakfast favorite, oat flakes can be enjoyed cooked or raw. This means that you can either boil them, as when preparing oatmeal or porridge, or enjoy them cold, such as by adding raw oats to shakes.

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