Skip to Content

Can Mashed Potatoes Go Bad

Can Mashed Potatoes Go Bad

can mashed potatoes go bad?

To put it simply, mashed potatoes can go bad. They will usually last for four to five days – that too in the fridge, after which they’ll start to go bad. It is advised to discard them after this time frame has passed as they’re no longer considered safe enough to be consumed.

Store your mashed potatoes in an airtight sealed container or sealed zipperlock bag so that your potatoes will last in the refrigerator for a long time. When stored correctly in an airtight container, mashed potatoes typically last 3-5 days in the fridge. Mashed potatoes will keep up to five days in the fridge, and they will keep fresh for at least ten months if stored properly in the freezer.

If the mashed potatoes are cooked, it will last from 3 to 4 days in the refrigerator, and nearly 10 to 12 months in the freezer, depending on the type of potatoes. You can store your mashed potatoes in your refrigerator up to four days, but if you would like to store them for any longer, freezing is the way to go. While many instant potatoes, or those packaged in boxes, can have preservatives in them to maintain their freshness, the truth is, after your instant potatoes are cooked, they still will only keep for around 3-5 days in your refrigerator.

Potatoes last for 1-2 weeks if kept at room temperature, and 3-5 months if stored in the veggie bin in the refrigerator. Potato salad, whether made at home, mixed with mayonnaise or vinegar, will last for 3 to 5 days in the fridge when stored correctly. Some healthy cooled potato salad does not spoil as easily, lasts quite a while in refrigerator, on the counter, or freezer. Having some nourishing refrigerated potatoes salad is nice to eat on sunny days, I guess you have to give it a go.

To save some time, if you have already peeled the potatoes, place in a plastic container and keep it refrigerated up to one week, until needed. It is recommended that peeled potatoes be left in water for 12-24 hours, and not peeled longer than 24 hours. Potatoes should be thrown out if left out at room temperature for more than two hours after cooking.

StorageTemperatureShelf Life
Kitchen counter60-68°F2 hours
In the refrigerator32-34°F3-5 days
Freezer0°F10-12 months
Shelf Life of mashed potatoes!

If the potatoes are cooked in the puree, they are best eaten 3-4 days after being cooked, re-heated to 165degF, which will destroy any bacteria that might have formed. It is best to eat potatoes within 4 days of cooking and reheated always to 165degF (74degC) to kill any bacteria that may have formed (4). The longer potatoes are left outside, or the older they are, the greater chance there is that mashed potatoes can cause serious food poisoning. You may have to throw away the potatoes before five days have passed if you notice a liquid separation, a foul smell, a color change, or the growth of mould.

Always remember to check leftover sweet potatoes for signs of mold or funny smells before heating. As always, check for signs of spoilage before eating, and discard any Instant Pot potatoes that appear, smell, or appear to be otherwise unsafe to consume. Be sure to check on your potatoes every few days to determine whether they are spoiled, and to discard any potatoes once you see signs of spoilage.

Learn how to make mashed potatoes properly

Store your mashed potatoes in your fridge no longer than 4 days, but be sure to constantly check on your mashed potatoes, and throw them out once you notice that the mashed potatoes are growing mold or smelling weird, even before the 4-day time limit has passed. If you would like to keep your mashed potatoes longer, freezing them before baking or after boiling can extend their shelf life, provided that you heat them up in a microwave instead of placing directly in the oven for roasting. Whatever you do in the end though, be sure to avoid using your microwave oven for this purpose, particularly for the mashed potatoes which have been frozen longer and lost water, which may develop a dry texture because of the loss of water, and a gluey texture too because of excessive heat or heating at a higher temperature.

Does Salad Dressing Go Bad If Not Refrigerated? Find the answer to this question by just clicking on this article.

If you would like to keep the mashed remains warm without cooking them again, put them in a oven-safe container or cover them in aluminum foil and put the container in a warm area.

You can add some extra liquid or oil if needed, but do so one small amount at a time until your mashed potatoes are to your desired consistency. Once it is under 70F, you can transfer the mashed potatoes to a shallow container or a ziploc bag and put in your refrigerator, unopened, until it is down to 40F. Drain the potatoes as directed, and stir in butter, warm milk, garlic, and sour cream. If the potatoes are not mashed smoothly enough using the potato masher, use a heavy-duty wooden spoon to make them more uniform.

Even without adding milk and eggs, you might find that cooked potatoes in their plainest form, like cooked potatoes, will still only keep for about 3-5 days. The general consensus here is that most cooked potatoes, of various types, will last you in the freezer a bit under a week before needing to be pitched. In your freezer, though, the potatoes mashed will likely last almost an indefinite amount, but are best used within one month of being stored, since this is when they will taste something close to their previous self, with no additional reinforcements from being thawed.

To learn about Does Brown Sugar Ever Go Bad, then check out my another article.

Instant Pot Potatoes are an awesome option if you are building up a food preservation system. Different ethnicities prepare potatoes differently Italians make gnocchi with potatoes, Indians make pockmarked potatoes, and they can be stored in a fridge or frozen. Potatoes are often thought of as comfort food, gloriously pureed in butter and cream, or deep-fried in oil.

Mashed or crushed potatoes, whatever you choose to call them, are incredibly tasty dishes that can pair well with meats or vegetables. Whatever variety of potatoes you opt for, Russets, Yukon Golds, or whatever kind strikes your fancy, mashed potatoes are a mealtime paradise. Potatoes are a favourite for a lot of people, even when children were used to eating potatoes, but the problem is when you purchase a bag of potatoes and store them in the kitchen, you have no idea how to keep them cold to make your mashed potatoes last.

Do mashed potatoes go bad if left out overnight?

I also found that this was said on a website called when it stated, “Big offenders include rice salads, pasta salads, and a dish of mashed potatoes that isn’t refrigerated after serving it as long as it has been on the table for some time.

Why did my mashed potatoes turn sour?

There is a risk if you leave mashed potatoes at room temperature for more than two hours, as bacteria will begin to form and multiply. Additionally, if you add dairy to the mashed potatoes, the risk increases dramatically. The dairy will turn, giving the mashed potatoes a sour taste, and mould may even appear.

Why did my mashed potatoes turn GREY?

Potatoes that have been peeled or shredded will start to turn grey or brown when they are exposed to air. The potato’s quality is unaffected, which is excellent news because this appearance might be off-putting. The potatoes can still be cooked and eaten even though they have turned grey because this is a normal reaction that is completely safe.