How long can overnight oats stay in the fridge?

In this brief article, we will answer the question, “How long can overnight oats stay in the fridge?”

How long can overnight oats stay in the fridge?

Overnight oats can stay in the fridge for up to 5 days. Overnight oats should remain chilled in a refrigerator especially during the warmer months. It needs to be kept in an airtight container in the fridge.

Overnight oats can remain in the best flavor for the first two days though they can remain in the fridge for 5 days. 

If it stays for a longer time in the fridge, the liquid would separate from the oats. This does not mean that the oats are spoilt. Just give it a quick stir. If you feel that your oats are too liquidy, you can add yogurt to enhance the texture of the oats.

The storage life of the overnight oats can be affected by ingredients added to the oats. If yogurt or milk is added to oats, it would have a considerably lower shelf-life.

In what part of the fridge should overnight oats be kept?

Overnight oats should be kept in a proper place in the fridge or else all your hard work in preparing the oats would be lost.

Avoid placing the overnight oats in the door of the fridge. This is because the door of the fridge is subject to temperature fluctuations when it is frequently opened and closed.

Place the overnight oats in the center of the fridge so that you remember to finish them as soon as you open the fridge.

Should toppings be added to overnight oats during refrigeration?

If you are planning to store oats for 4-5 days, it is better to remove the toppings like granola, nuts, coconut flakes, or fruits added to it. These toppings can become softer if kept in the fridge for long. Only add these toppings to the oats while serving them.

If you still wish to add fruit toppings to the oats and refrigerate them, you can add fruits like pineapple, strawberries, blueberries, or pineapples as though do not turn mushy easily.

Adding frozen fruits to the overnight oats is another option. Frozen fruits can blend into the oats and provide you with a delicious flavor compared to eating the oats without toppings.

If you add fruits like apple or banana to the oats, they can develop a brownish color but this does not affect the flavor or texture of the oats. The flavor of the oat will increase.

It is better to keep the overnight oats in glass containers. Glass does not take in odors, unlike plastic. Place overnight oats in a tightly sealed container as well.

Can you store overnight oats at room temperature?

You can place overnight oats for a short time in a cool and dark place. It can also be kept at the kitchen countertop for a short period of time. Avoid leaving overnight oats for a long time at room temperature.

Oats when mixed with water can be an excellent place for the microbes to grow. As a result, do not keep overnight oats at room temperature for more than four hours. Dry oatmeal has a better shelf-life than wet oats.

What are some suggestions to store and prepare overnight oats?

A few suggestions to store overnight oats are as follows:

  • If you wish to add milk instead of water to prepare overnight oats, use almond milk. Not only is almond milk vegan but also it has a longer shelf-life than cow’s milk. 

The thickness and creaminess of almond milk are also similar to that of cow’s milk which makes it a better alternative.

  • If you like chewy and rich oats, you can reduce the amount of water added to the oats. Increasing the amount of yogurt added to oats can also help in increasing the thickness of oats.
  • You can cook two jars of oatmeal. When the first jar of oatmeal, replace it with the other jar of oatmeal.
  • Soaking the oats for a long time can help in reducing the amounts of phytic acid present in the oats. Phytic acid interferes with nutrient absorption.
  • Avoid enough liquid in the oats to prevent the oats from drying. This is because the oats can absorb the liquid content and the saturation rate is maximum in the fridge. 

This does not mean that you should add excess liquid. It is important to strike a balance.

The ratio of oats to liquid can be 1:1. It can also be 2:1 liquid to oats.

Other FAQs on overnight oats that you might be interested in.


In this brief article, we have answered the question, “How long can overnight oats stay in the fridge?”


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.