How Long Are Mashed Potatoes Good For?

The love for potatoes is universal. And mashed potatoes have been one of the favorite items of the entire family.

But people often wonder how long mashed potatoes are good for? Knowing its lasting period allows people to understand if they can store it or consume it at once.

This guide answers all your queries related to the dish. Once you are done reading, you can make an informed decision when to keep or discard the mashed potatoes.

How long are mashed potatoes good for?

How long can you eat Thanksgiving leftover mashed potatoes?

Typically, the mashed potatoes can last between 3- 5 days when you refrigerate them.

Make sure you keep it in an airtight container. Otherwise, the condensation could make potatoes watery.

Also, this way, the potatoes will remain scrumptious and moist.

Ways to ensure mashed potatoes last for the maximum limit

Mashed potatoes are the comfort food for many people. However, inadequate storage of the potatoes may rot it in no time.

You should know the essential tips that will keep the mashed potatoes fresh for as long as they can. These are:

  • Store the potatoes in a cool place
  • Don’t freeze the potatoes for a more extended period

Another tip to ensure mashed potatoes last their optimal limit is placing them in the fridge within 3 hours of cooking.

How do the mashed potatoes spoil?

As mentioned earlier, it is recommended to refrigerate the mashed potatoes within three hours. Otherwise, they may become dry and lumpy.

It occurs because moisture in the potatoes reduces as it stays outside.

Steps to freeze mashed potatoes

Remember to follow the food safety rule of storing within 2 hours to freeze the mashed potatoes. Then:

  • Let the potatoes cool
  • Add portions in a zip-lock bag or a plastic container after you have checked their freezer safety
  • Keep the bags flat and let the excess air out
  • Put them in the freezer

Remember, you cannot freeze the mashed potatoes for a long time. You have to consume it within 3 to 5 days, becoming soggy.

Steps to refrigerate the mashed potatoes

If you or other family members love mashed potatoes, you might have thought about storing some for the week.

Even though you cannot store mashed potatoes for a whole seven days, you can extend their shelf life by following a process.

The best way to refrigerate mashed potatoes is as follows:

  • Let the baked/cooked potatoes sit for one hour
  • Determine the portion you need to store (portion sizes means you will only take out the amount that is required)
  • Find an airtight container or ziplock bag that works for the desired portion
  • Keep them in the refrigerator

You have to complete this process within 2 hours of cooking. Also, choose a container that doesn’t encourage moisture build-up, leading to bacteria formation.

What indicates rotten mashed potatoes?

How to tell if mashed potatoes are bad

The best way to indicate if a food is rotten is to smell and look at it.

And when it comes to mashed potatoes, the following signs will help you to determine if they are off:

Foul odor

The smell can always tell you if the food is edible or not.

If you have an unpleasant odor in your kitchen, you should check the fridge. Perhaps the potatoes are rotten (sometimes, they may change their physical appearance too).

Mashed potatoes give out a stinky smell when stored for longer than usual. Sometimes, they look fine, but the scent shouts aloud to throw them in the garbage can.

Unusual appearance

Appearance is the first factor that tells you whether a food item is fresh or not.

Often, there are black patches, or a dish could change its color entirely. In some cases, there are different signs, such as a white layer or dryness on the surface.

These signs show that the potatoes have lost nutrients, such as proteins and fats. Once you see these indications, you should look for a fresh meal and discard the rotten potatoes.

Bad taste

If you aren’t sure about the physical appearance and taste, you can nibble some part of the potatoes. Take a small portion, like a pea-sized bit.

If the taste is different and sour, it is a sign that the potatoes aren’t edible anymore.

Forgotten storage day

It often happens that we keep something in the fridge, which slips off our minds. The same can happen with your dearly cooked mashed potatoes too.

You may come across a bowl of mashed potatoes and can’t remember the day you kept it in the fridge.

The signs mentioned earlier, bad smell, bad taste, and unusual appearance, will help you determine if they are fresh.

We recommend that you don’t take any risks and trash it away to avoid food poisoning or any other illnesses.

Consequences of consuming rotten mashed potatoes

The mashed potatoes may harbor bacteria that cause diarrhea and diseases like listeria, salmonella, and botulism. Bear in mind that cooked mashed potatoes can cause severe food poisoning.


What can I do with the rotten mashed potatoes?

You have to discard the rotten mashed potatoes without further delay.

In fact, you should cover your mouth and nose when doing so because you may inhale a poisonous substance called solanine.

How long is mashed potato safe to consume?

The cooked mashed potato will stay safe to consume for 3 – 5 days if you store it in the fridge. But it lasts fresh in the freezer for 6 – 8 months.

However, the long duration may compromise the quality of the potatoes.

How will I know if the potatoes are moldy?

The mold growth or dark spots will tell you if the potatoes are moldy.

On the other hand, the fresh potatoes have a distinct odor which signifies that it is healthy and safe.

Final Thoughts

Mashed potatoes are almost everyone’s favorite. We suggest you consume them right away or cook in limited quantities in light of the mentioned details.

In case you want to store them for later, make sure they are eaten within a few days to avoid wastage.