Oatmeal is a popular breakfast food nowadays for busy workers. It supplies your various nutrition needs and gives many benefits. Today I will explore a topic that many of you have. The question is, how long can oatmeal sit out? So let’s learn about it and additionally add much more to your knowledge.

How long can oatmeal sit out?

Oatmeal can sit at room temperature for up to four hours before it spoils. This means that if you leave cooked oatmeal out on the kitchen counter, it is generally safe to eat within four hours. However, the oatmeal may spoil faster if the room is very warm or humid.

If you plan to leave oatmeal out for more than four hours, it is best to refrigerate it to keep it safe for up to two days. It is best to put it in the fridge to prevent bacteria growth.

The USDA recommends following the “2-hour rule” for perishable foods like cooked oatmeal. This means that if you leave cooked oatmeal out at room temperature for more than 2 hours, bacteria can start to grow, and it may not be safe to eat.

Cooked oatmeal should not be left out at room temperature for more than 2 hours. This is because bacteria can grow rapidly on perishable foods when they are left out at room temperature for too long. If you leave cooked oatmeal out for longer than 2 hours, discarding it to reduce the risk of foodborne illness is best.

Storing it in the refrigerator or freezer is best to keep cooked oatmeal fresh and safe to eat. If you want to keep cooked oatmeal for longer than a few hours, store it in an airtight container in the fridge or freezer until you’re ready to eat it. When reheating refrigerated oatmeal, ensure it is heated to at least 165 degrees Fahrenheit to kill any potential bacteria.

Oatmeal and fruits

Is it safe to eat oatmeal left out overnight?

No, it is not safe to eat oatmeal left out overnight.

However, you can prepare overnight oats without cooking the oats by soaking them in a liquid overnight. The raw oats become soft and digestible, transforming into delicious and nutritious meal prep.

Overnight oats should be refrigerated while soaking to minimize the risk of foodborne illness. Oats soaked at room temperature will ferment, and although fermenting food has been practiced for thousands of years, it goes against modern food safety guidelines.

After soaking oats in liquid for 4-5 hours at room temperature, it is common to refrigerate overnight oats to slow the growth of beneficial bacteria and prevent over-fermentation. The maximum time for overnight oats to remain out of the fridge is 12 to 24 hours, depending on the recipe, the temperature of the room, and the comfort level of eating fermented foods.

How do you know if oatmeal has gone bad?

Oatmeal can last a long time if it’s stored properly.

Oatmeal can last between one to two years If stored in a sealed, airtight container in a cool, dry, and dark area. Sealing in plastic bins and cans can last as long as thirty years. However, oats can expire quickly and turn rancid when improperly handled or stored.

Date labels are not always accurate.

Date labels such as best by, sell by, use by, and best before are examples of expiration date labels that can be confusing. Date labels are not based on exact science. Manufacturers provide date labeling to help consumers and retailers decide when food is of the best quality, and date labeling does not concern food safety.

Different types of oats have different shelf lives.

Whole grain oats, oat groats, have the most extended shelf life because they are minimally processed and retain the whole shape. Steel-cut oats frequently last three to five years, rolled oats between one to two years, and quick oats have a shorter lifespan of about six to nine months.

Proper storage is important to prevent spoilage.

The oatmeal storage container must be airtight and reduce exposure to airflow and moisture. Oxidation can make the oats stale, while moisture grows mold. Both will affect the quality and freshness of the oats even if they are not expired based on date.

Storing in the fridge is possible but not the most practical option.

You can store oats in the fridge or freezer, but it is generally not the most efficient use of space and energy. Therefore, it is recommended to store oats in a dry storage or pantry.

Your senses can help you determine if oatmeal has gone bad.

To determine if oatmeal has expired, rely on your senses. Raw oats should have a sweet, nutty smell, look dry, and be taste-neutral without any strong, bitter, or foul flavors. Discoloration, mold, an off-putting smell, and critters indicate that the oatmeal has gone bad.

Overnight Oats

How long can overnight oats sit out at room temperature?

Overnight oats are made by soaking raw oats in liquid, which makes them soft and digestible. It is recommended to refrigerate oats overnight while soaking, but they can also be made without refrigeration.

Soaking oats overnight liquid makes them easily digestible and creamy without requiring cooking in the morning. You can eat the oats cold, at room temperature, or heated.

They should be soaked for at least 12 hours to reduce phytic acid. It is safe to leave overnight oats out of the fridge for 12 to 24 hours, depending on the recipe, the room temperature, and your personal preference.

Leaving soaked oats at room temperature for too long will make them inedible due to over-fermentation. The warmer the room temperature, the faster the microorganisms multiply. Refrigerating overnight oats will slow the growth of beneficial bacteria, while fermenting at room temperature will introduce the nutritional elements of fermentation.

What is the shortest time you can leave overnight oats?

Overnight oats are typically soaked for at least 6 to 10 hours, which allows the oats to fully absorb the liquid (usually milk or yogurt) and become soft and creamy.

However, according to most recipes, the minimum amount of time you should soak rolled oats in milk is 4 hours. So, leaving overnight oats for at least 4 hours is best to achieve the desired texture and flavor.

The benefits of soaking oats and tips for preparation

Raw oats are not easily digestible, which is why overnight oats are recommended. As I mentioned earlier, soak overnight oats for at least 12 hours to break down phytic acid and increase beneficial bacteria to make oats more digestible.

The microorganisms that come to life during the soaking process improve and support digestibility. Soaking also softens the texture, making the oats more palatable.

When preparing vegan overnight oats recipes, they are naturally gluten-free and dairy-free. Soaking the oats reduces the anti-nutrient phytic acid, making it easier for the body to absorb essential minerals such as calcium, iron, and zinc. Raw oats contain high concentrations of phytic acid, which can hinder the absorption of these essential minerals.

For optimal results when soaking oats, adhering to a standard overnight oats ratio, such as 1½:1 or 2:1 liquid to oats, is important. A splash of acid like apple cider vinegar or lemon juice should be added and soaking should continue for at least 12 hours to break down phytic acid.

If you soak overnight oats for at least 12 hours, you can serve and consume them immediately. You can add mix-ins and toppings such as chopped nuts, dried fruits, honey, cocoa powder, and fresh berries to enhance their flavor. Moreover, it’s advisable to warm the soaked oats in the microwave before serving.

However, consuming overnight oats after two hours of soaking is not recommended, as the phytic acid would not have had enough time to break down. The soaking process can be expedited by using boiling water to soak the oats, as hot water will activate beneficial bacteria and initiate microbial breakdown if the starches.

Oats are an extremely versatile food that pairs well with many foods. You can add ingredients and toppings to overnight oats to enhance their taste. Some people add crunchy elements to overnight oats, while others add different flavored powders such as cocoa powder, nutmeg, cinnamon powder, and more. Fresh fruit slices can also be added to overnight oats.

Overnight oat

How to store milk and oatmeal in the refrigerator

If you’re wondering whether you can keep milk and oatmeal in the refrigerator for later consumption, the answer is yes! However, there are a few things you need to keep in mind to ensure their freshness and safety.

How long can milk and oatmeal be stored in the refrigerator?

Milk and oatmeal can generally be stored in the refrigerator for about a day. However, you should prioritize food hygiene and avoid eating raw or spoiled food.

How to store milk in the refrigerator?

If you buy milk in a large bottle or a super-large box, and you can’t drink it all at once, it’s crucial to seal it with a bottle cap again. Otherwise, the milk will contain many bacteria and other harmful substances after being left open at room temperature for more than 4 hours. It’s basically undrinkable after more than 8 hours.

However, if you seal it again and place it in a low-temperature environment of 3-5 degrees Celsius in the refrigerator, the storage time can be extended for about 1-2 days. Also, don’t pour the remaining milk in the cup back into the original packaging to prevent bacteria from entering, which can make the remaining milk in the original packaging go bad faster.

How to store oatmeal in the refrigerator?

Oatmeal can be stored in the refrigerator. If it has been opened, it’s best to wrap it in plastic or a sealed container with the package. Then, cover the container lid and store it in a ventilated and dry place. If it’s unopened oatmeal, it can be stored directly in a ventilated and dry place.

Summary

Oatmeal can sit at room temperature for up to four hours before it spoils. However, the oatmeal may spoil faster if the environment is warm or humid. If you plan to leave oatmeal out for more than four hours, it is best to refrigerate it to keep it safe for up to two days.

Cooked oatmeal should not be left out at room temperature for more than 2 hours. Overnight oats should be refrigerated while soaking to minimize the risk of foodborne illness.

To determine if oatmeal has expired, rely on your senses. Raw oats should have a sweet, nutty smell, look dry, and be taste-neutral without any strong, bitter, or foul flavors. Discoloration, mold, an off-putting smell, and critters indicate that the oatmeal has gone bad.

FAQ

Can I eat overnight oats after 7 days?

Overnight oats can be stored in an airtight container in the fridge for up to five days. While eating overnight oats after seven days is possible, consuming them within the first five days is recommended for optimal freshness and quality.

What is the minimum time to soak oats?

To properly soak oats, it is recommended to soak them for a minimum of 12 hours. The easiest way to soak oats is with water, following a basic overnight oats ratio such as 1½:1 or 2:1 liquid to oats.

Can I leave overnight oats unrefrigerated?

Overnight oats should not be left unrefrigerated indefinitely. Most people stick with 4-5 hours to deter the rapid growth of microorganisms. Overnight oats can be consumed within 12 to 24 hours if refrigerated.

Can you eat overnight oats without letting them sit overnight?

Yes, overnight oats can be eaten immediately if they have been soaked for a minimum of 12 hours.

Can you soak oats for an hour and eat?

While it is possible to soak oats for an hour, eating them immediately after soaking is not recommended. Oats should soak for at least 12 hours, but 24 hours is best, and a little longer is okay too.

Author

Sam Perera, Founder of Stethostalk, is a food safety follower and organic food lover. He has completed the PLANT-BASED NUTRITION Cornell Certificate Program, Cornell University, US. Before this, he worked for a few years in IT services. A dedicated follower of nature, he believes in healing with natural foods. In his free time, he loves Gardening, Blogging, and traveling.