How Long Can Cooked Potatoes Sit Out? Is It Safe To Eat Overnight Leftovers?

Potatoes have long been the all-year-round staple of European and American cuisine. That it’s so versatile, tasty, and demanding makes people cook these tubers in large batches and store them for later use. But the question is: How long can cooked potatoes sit out?

Cooked potatoes are convenient and nutritious if you consume and store them correctly. Yet, it’s a different story if you eat some not-too-good potatoes.

In this brief article, we will give you the best answer to the question and some signs to tell your dish has gone bad. Let’s go through it now!

How Long Can Cooked Potatoes Sit Out

Cooked and cooled potatoes contain a variety of healthy nutrients. Still, you want to consume them within 12 hours of cooking. Potatoes are easily spoiled, and bacteria can grow in conditions not normally found in the refrigerator.

How Long Can Cooked Potatoes Sit Out
Cooked potatoes

It’s highly recommended to refrigerate baked potatoes and not left baked potatoes out overnight.

How Long Do Baked Potatoes Last At Room Temperature?

Temperatures between 40°F and 140°F are ideal for bacterial growth, so baked potatoes should not be at room temperature for more than 12 hours. The same answer applies if you wonder can boiled potatoes be left out overnight.

But how long do potatoes last at room temperature can change. If the two following conditions are fulfilled, they can be at room temperature for a longer period (approximately a day). They are covered with a clean cloth to limit bacterial attack and retain moisture, and the potato skin remains intact.

How Long Are Cooked Potatoes Good For If Stored In The Freezer?

Enzymes are destroyed when potatoes are cooked, which, in turn, causes color alternation from yellow to brown.

Potatoes will not change color and will be preserved for the longest time when placed in the freezer due to the minimized exposure to the outside air. Hence, you want to remove all the air from the bag or container before putting it in the freezer.

So, how long can you keep cooked potatoes frozen? According to researchers, cooked and frozen potato products can be stored for up to a year without losing quality. They will keep their quality for 10 to 12 months if properly stored but can still be used after that time.

The time frame shown is only for best quality; prepared potatoes kept frozen continuously at 0°F will keep indefinitely.

How Long Will A Baked Potato Last After Being Frozen And Thawed?

Do baked potatoes go bad after leaving the freezer? Unfortunately, yes!

Baked potatoes that have been defrosted in the refrigerator can be kept for an additional 3-4 days before cooking. But those that have been defrosted in the microwave or cold water should be eaten right away.

How To Tell If Cooked Potatoes Are Bad?

How To Tell If Cooked Potatoes Are Bad
Signs of bad cooked potatoes

Prepared potatoes with a strong, foul odor or visible mold indicate spoilage.

In some cases, this food may contain harmful bacteria without any visible signs. Potatoes, especially when cooked, are more likely to produce bacteria that cause food poisoning. This is due to the fact that they retain a lot of moisture, are slightly acidic, and contain some protein.

As a result, they should be used within 4 days of cooking and always reheated to 165°F to kill any bacteria that may have formed.


Like bad chicken and other spoiled food, potatoes that have gone bad, both raw and cooked, emit a sour, ammonia-like odor. This scent may be difficult to detect if the potato has been marinated with sauces, herbs, or spices like in an overnight baked potatoes recipe.


If not diced or sliced, the shape of prepared potatoes does not change compared to uncooked ones. But when the former spoils, gray spots like mold appear; these spots can be seen with the naked eye.

If your potatoes have already been peeled, this sign will be difficult to detect. Furthermore, if the damage is severe, the potato flesh will be soft and watery, with a bad, sour odor.

How To Store Them In The Fridge Safely?

If you wonder, “Do cooked potatoes need to be refrigerated?” the short answer is Yes, definitely.

They can be kept in the refrigerator for several days. The unwanted side effect is that they might be soggy because potato starch changes shape and releases water as it cools.

Cooking and refrigeration also contribute to the formation of resistant starch, a type of carbohydrate that humans cannot digest and absorb.


How long can potatoes sit out depends a lot on the external temperatures. Potatoes can be stored at a temperature of 50-60°F in a dark, dry, and airy place for 2 weeks to a month.


If you are not going to use all of the prepared potatoes, it is recommended that you place them in the freezer. This step will help preserve the potatoes for a longer period without having to worry about damage.

Frequently Asked Questions

Can You Freeze Baked Potatoes?

After baking the potatoes, let them cool before putting them in an airtight container and storing them in the refrigerator.

Can You Freeze Mashed, Roasted, Or Scalloped Potatoes? 

Yes, and it’s a lot simpler than you think. Allow them to cool completely before storing them in a freezer bag or freezer-safe storage box. If you’re using bags, make sure to get rid of as much air as possible before putting them in the freezer.

Can You Eat Cooked Potatoes Left Out Overnight?

Although potatoes are a nutritious and healthy food, if left overnight (more than 12 hours) and reheated in the microwave, all the useful properties will disappear; not only will the valuable nutrients in potatoes be lost, but they will also produce toxins, causing bloating and indigestion for people who eat them.

Do Cooked Potatoes Have To Be Refrigerated?

Yes, they should be refrigerated at 40°F or lower as a general rule to extend their shelf life.

How To Reheat Cooked Potatoes?

There is no need to defrost peeled or cut potatoes. However, if you use whole potatoes, it’s a good idea to place them in the refrigerator and defrost them overnight. It shouldn’t take long to reheat prepared potatoes.

The best method for reheating prepared potatoes depends on what you intend to do with them. The rule of thumb is to use the oven because it keeps the potatoes whole and prevents them from breaking or becoming mushy.

Final Thoughts

In short, we have shown you details about the topics: how long can cooked potatoes sit out and how long can you keep boiled potatoes. Generally, you can save cooked potatoes some time in the fridge for later use, but it should be done in the correct ways.

We hope this post is useful to you and wish you success in storing your cooked potatoes.

Kevin Richard

Hi all! I’m Kevin. I spend plenty of time in the kitchen every day because I love cooking healthy and delicious foods for my family and friends. Cooking gives me a chance to be creative and fun. It’s also one of the most meaningful ways to express my love and take care of my little family.

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