How long do Mashed Potatoes last in the Fridge?

In this brief guide, we will answer the question, “How long do Mashed Potatoes last in the Fridge?”. We will delve into the popularity of mashed potatoes and added ingredients. Then, we consider the spoilage factors and storage methods of mashed potatoes.

How long do Mashed Potatoes last in the Fridge?

Mashed Potatoes will last in the fridge for about a week.

How long will the ingredients in Mashed Potatoes last in the fridge?

The ingredients also come into play when it comes to spoilage of your mashed potato dish.

If there are additional ingredients in your mashed potatoes, it will interfere with the storage procedure. Dairy-based products such as cream and milk are more susceptible to spoilage. Hence, if you stored it in the refrigerator within 2 hours of cooking the meal, it will stay fine.

If you have added milk, cream, cheese, or butter to your mashed potatoes; then they will last you for under a week.

How long do mashed potatoes last after being thawed in the refrigerator?

In the freezer, your mashed potatoes will keep for 6 months. Mashed Potatoes keep their desirable taste and texture in the freezer, especially if they have milk or cream added to them.

When you are ready to consume your mashed potatoes, let them thaw in the refrigerator instead of room temperature. Your securely stored mashed potatoes will keep in the fridge for 3-4 days. In case you thaw the frozen mashed potatoes in the microwave or cold water, use them immediately.

Let us look at some ways to make sure that your mashed potato lasts for as long as it can:

  • Refrigerate the mashed potato within 2 hours of preparing it.
  • Choose your ingredients wisely.
  • Before you refrigerate, make sure it comes down to room temperature.
  • Always keep your mashed potatoes covered in an airtight container.
  • Use a plastic film to wrap the mashed potatoes in, then put it into an airtight container before you store it.

Why should you cover your mashed potatoes before storing them in the fridge?


When you cover the mashed potatoes, you prevent ambient microorganisms and oxygen from your food. If you leave your food uncovered, you are inviting bacteria to spoil it.

When you cover your mashed potatoes, you prevent the flavor and smell of other foods from defiling them.

According to the USDA, potatoes will become unsafe if kept at a temperature greater than 41 Fahrenheit for over 2 hours.

The USDA also suggests that the temperature of 40 F to 140 F labels as The Danger Zone. This range of temperature encourages bacterial growth.  Spoilage is usually a quality issue in its initial stage and does not cause illness. However, gradually the food becomes a complete hazard.

Other FAQs about Potatoes which you may be interested in.

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How to reheat Mashed Potatoes?

When you reheat the mashed potatoes, you can add ingredients such as herbs and spices of your choice.

If you use a stovetop to reheat the refrigerated mashed potatoes, use low heat. 

Use your oven to heat the potatoes at 350 Fahrenheits by first covering them in a heat-proof dish.

A slow cooker is also a viable option to reheat the mashed potatoes. All you need to do is transfer the mashed potatoes into the slow cooker and heat it for 2-4 hours at low heat.

A microwave is also a suitable option; however, more challenging than the rest of the methods. Heat at low power for 5-10 minutes. You might need to stir the potatoes intermittently.

To what reasons do potatoes owe their popularity?

 Potatoes are one of the world’s widely eaten crops and the third most essential crop for humans. 4000 different kinds of potatoes are present in nature, in various sizes and shapes. Potatoes are an all-rounder and favorite among all. People can enjoy a variety of potato dishes in almost every culture. 

Potatoes have various health benefits as they are rich in carbs and have large quantities of proteins and fiber. They are also high in water. Several vitamins like vitamin C and vitamin B6 and minerals like potassium are present. It also improves blood sugar control by a starch called resistant starch. 

How do mashed potatoes spoil?

When Mashed Potatoes spoil, they give an off-odor. A process called fermentation occurs that gives off a tangy smell.

You will also observe patches of a different color or shiny. Mashed potatoes also appear dried out as they spoil. 

If your mashed potatoes look fine but do not taste right, it indicates spoilage as well. When bacteria cause the mashed potatoes to spoil, the taste becomes sour. If your mashed potatoes taste distinct and unfamiliar, we do not recommend that you consume the rest.

In this brief guide, we answered the question, “How long do Mashed Potatoes last in the Fridge?”. We delved into the popularity of mashed potatoes and added ingredients. Then, we considered the spoilage factors and storage methods of mashed potatoes.