Cooked potatoes and other cooked vegetables can be safely kept in the refrigerator 3 to 4 days. United States Department of Agriculture's Food Safety and Inspection Service does not inspect fruits or vegetables.
Make sure the potatoes are eaten within two hours of being cooked, or keep the potatoes at 140 degrees F or hotter. Or put them in the refrigerator within two hours of being cooked. This would apply to dishes such as mashed potatoes, potato soup, boiled potatoes, and potato salad.
Shelf life of potatoes
Once cooked, potatoes last up to 4 days in the refrigerator and 1 year in the freezer, though the quality of cooked mashed potatoes suffers with freezing (4, 5).
How Long Do Potatoes Last at Room Temperature? When stored in a cool, dark place, (warmer than the fridge but colder than the average temperature of your kitchen) whole, uncooked potatoes can last up to two months. At room temperature, on the counter, for example, potatoes will last up to two weeks.
Smell Test
Once your cooked potatoes smell bad, sour, or moldy, that's a clear sign that their next destination is the trash as they're no longer safe to eat.
Sad news for spud lovers: reheating leftover potatoes could make you ill. As the Independent reported, the issue with reheating potatoes isn't actually the process of warming them in the microwave or oven. If cooked potatoes are left to cool at room temperature for too long, the bacteria that causes botulism may form.
Bad potatoes contain high levels of solanine and can cause solanine poisoning. Symptoms include nausea, diarrhea, stomach cramps, vomiting, headache, dizziness, among other things. Mild solanine poisoning should only last around 24 hours- but definitely seek medical help if you need it!
NO! This is the wrong way to do it and is not food safe. Cooked starch foods like potatoes can grow germs if not kept either refrigerated and cold or hot over 140º F.
You want to be able to eat your potato without worrying if you are going to get food poisoning or botulism. Here's how you can ensure that your baked potatoes are safe to eat. DON'T let your potato sit out in the open at room temperature for over four hours regardless of whether or not it is wrapped in aluminum foil.
Cooked potatoes and other cooked vegetables can be safely kept in the refrigerator 3 to 4 days. United States Department of Agriculture's Food Safety and Inspection Service does not inspect fruits or vegetables. The United States Food and Drug Administration (FDA) inspects these foods.
TCS refresher
TCS foods, like cooked potatoes, are prone to bacteria growth because they are moist, contain protein and have a neutral or slightly acidic pH. This is ideal for the growth of microorganisms and production of toxins.
If you want to eat the next day the boiled potatoes, all you need to do is to wait until they will cool down, store them in an airtight container in the fridge, and when is needed you can reheat them in the oven, microwave, air fryer, or in a steamer.
Overcooked potatoes aren't always dry and hard, as it's possible to overboil a potato too. When you do so, more water is absorbed by the potato. Then, when you go to mash them, the water releases, resulting in that sad, soupy mess you may want to toss in a compost pile far, far away.
You can store peeled potatoes in water in the refrigerator for about 24 hours. Peeled potatoes left out by themselves at room temperature, on a refrigerator shelf or wrapped in foil or plastic wrap will still get dark overnight, so submerge them in a bowl of water, cover and refrigerate.
“When these are stored in the fridge, the starch in the potato is converted to sugar. When baked or fried, these sugars combine with the amino acid asparagine and produce the chemical acrylamide, which is thought to be harmful.”
Potatoes can last for up to several months in a cool pantry. If stored at room temperature, they are best if eaten within one to two weeks. Once cooked, keep them in the fridge for no more than three days.
Once cooked (whole or cut) potatoes can be stored in water (with or without vinegar) without becoming discolored or mushy. But, water storage isn't necessary. Refrigerate the boiled potatoes in a sealed container and use within a couple of days.
We usually recommend no more than 24 hours. You can keep the potatoes from absorbing the water by making sure the water is not salted, and is chilled (you can even add ice to the water). To keep the potatoes from turning black from oxidation, add 1 teaspoon of lemon juice or white wine vinegar to a gallon of water.
The two-hour window
Generally, it's best to put hot food and leftovers into the fridge within two hours of being cooked. After this time, bacteria can start to grow and transform your delicious meal into a bout of food poisoning waiting to happen.
Both solanine and chaconine cause toxicity through cell disruption leading to gastrointestinal symptoms such as vomiting, abdominal pain, and diarrhea. Some people may also experience headache, flushing, confusion, and fever. There have been a few cases of death from eating toxic potatoes.
Vegetables with High Amounts of Nitrates
If you have spinach or any green leafy vegetables, carrot, turnip or even celery, avoid reheating them in the microwave. These nitrate rich vegetables when heated again can turn toxic, releasing carcinogenic properties, which are generally cancerous in nature.
Baked potatoes that have been wrapped in foil have been linked to cases of botulism. Clostridium botulinum spores can survive the baking process and the foil wrap seals the potato preventing oxygen from being present.
Potatoes have been implicated in outbreaks of Salmonella and botulism, and E. coli. One of the most recent potato-related recall occurred in 2016 due to a Salmonella Braenderup outbreak in potato salad.
Test Kitchen Tip: You can boil potatoes ahead of time for use later as long as you cover and refrigerate them. They'll last for up to three days in the fridge.