No, eating week-old mashed potatoes is not recommended, as they typically only last 3-4 days in the refrigerator when stored properly; after a week, there's a high risk of bacterial growth, even if they look and smell okay, so it's best to discard them to avoid food poisoning. Always rely on proper storage (airtight container, rapid cooling) and the 3-4 day rule, tossing any leftovers that exceed that timeframe, especially with dairy ingredients.
Depending on how cold the fridge is you should be fine though 7 days is the far end of tolerance.
Cooked potatoes and other cooked vegetables can be safely kept in the refrigerator 3 to 4 days. The United States Food and Drug Administration (FDA) regulates fruits and vegetables, if more information is needed on produce, you can call the FDA toll-free at (888) 723-3366 or go to their website at FDA .
Mashed potatoes that have gone bad generally have clear indicators. If you see glossy patches or dry spots, they are no longer fresh and should be thrown out. Additionally, if you notice any signs of spoilage like a sour or “off” smell (that is, any unexpected scent), you're better off throwing out the potatoes.
It's generally not recommended to reheat mashed potatoes multiple times. Each time food is reheated, it increases the risk of bacterial growth, so if you are going to reheat them, reheat only what you'll consume and not the entire batch of leftovers.
You might be able to salvage them the next day by heating them up with additional butter or cream, but they'll probably never return to their former glory. Instead, here are a few creative ways to use up leftover mashed potatoes that won't leave you wishing it was yesterday.
Heat-resistant spore-forming bacteria such as Bacillus and Clostridium can survive and grow in cooked potato products. This situation represents both a public health problem and an economic problem. The natural food preservative nisin is used in heat-treated foods to prevent the growth of such bacteria.
Solanine and chaconine can cause gastrointestinal symptoms such as vomiting, abdominal pain, and diarrhea. Some people might also experience headaches, flushing, confusion, and fever. There have been a few cases of death from eating toxic potatoes.
Decaying potatoes aren't safe to eat; they're full of microorganisms and glycoalkaloids that can make you sick, no matter what way you cook the potatoes. Additionally, it probably won't taste very good; decaying potatoes often taste bitter or even sour.
Store potatoes in a cool, dry, dark place. Peel the potatoes before cooking can reduce the amount of glycoalkaloids. Cut away any parts that show damage (cuts and bruises), rotting, green colouring and sprouting before cooking. In severe cases, discard the entire potato.
Usual guidelines for cooked leftovers is in the 3-4-5 day range. Some folks who are less risk averse will even push it to a week. 10 days is too long. If you eat it and don't get sick it's going to be your lucky day.
Leftovers can be kept for 3 to 4 days in the refrigerator. After that, the risk of food poisoning goes up. If you don't think you'll be able to eat leftovers within four days, freeze them right away. Frozen leftovers will stay safe for a long time.
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.
Despite their nutritional value, potato tuber may harm human health by virtue of their toxic glycoalkaloids (solanine). Acute solanine poisoning can happen from ingesting green or sprouted potatoes. The toxicity of Gas in humans causes mainly gastrointestinal disturbances such as vomiting, diarrhea, and abdominal pain.
However, it is not worth the risk as it can cause diarrhoea, stomach cramps, fever, vomiting, nausea, and more. Potatoes that have turned green contain solanine. Solanine is a neurotoxin, and ingestion by humans can cause nausea, headaches and can lead to serious neurological problems and even death.
Spoiled mashed potatoes can bring unpleasant food poisoning symptoms. There's also the risk of developing botulism, a severe form of food poisoning that can cause muscle weakness, difficulty breathing, impaired vision, slurred speech, and droopy eyelids.
Early signs of foodborne botulism are sudden weakness, fatigue, and dizziness (vertigo), often followed by blurred vision, dry mouth, difficulty swallowing, and trouble speaking, as the paralysis descends from the head downwards, affecting the eyes, face, and throat muscles first, with no fever. Gastrointestinal issues like nausea, vomiting, or constipation might also occur early on, and prompt medical care is crucial as it progresses to respiratory failure.
Symptoms may include:
Unripe tomatoes and the green "eyes" of potatoes contain solanine that can cause moderate nausea, vomiting, headache and diarrhea. Eating large quantities can cause drowsiness, sweating, and changes in blood pressure and heart rate. Most effects are seen within 2 to 24 hours. Diarrhea may last for three to six days.
Avoid storing potatoes in the refrigerator or under the sink — a moist environment can cause the spuds to sprout prematurely. The refrigerator can also cause the potatoes' starches to convert to sugars, which will make your potatoes sweeter and gritty in texture.
More ways to prevent botulism
If you bake potatoes wrapped in aluminum foil, Keep them at 140°F or hotter until they are served, or. Refrigerate them with the foil loosened so they get air.
Most home processing methods like boiling, cooking, and frying potatoes have been shown to have minimal effects on solanine levels. For example, boiling potatoes reduces the α-chaconine and α-solanine levels by only 3.5% and 1.2% respectively, but microwaving potatoes reduces the alkaloid content by 15%.
Mashed potatoes should easily last three to five days in the fridge if stored correctly and within two hours of cooking.
Properly store mashed potatoes will stay fresh in an airtight container in the fridge for 3-4 days and up to 4 months in the freezer.