You purchased a bag of potatoes and are debating whether or not they go within the pantry or the fridge. Otherwise you simply baked a potato for dinner and usually are not positive how you can retailer the leftover half. The reply is completely different relying on whether or not the potato is uncooked or cooked, and for uncooked potatoes, the fridge is the improper alternative for a motive most individuals have no idea.
Do potatoes must be refrigerated?
The quick reply: Complete uncooked potatoes shouldn’t be refrigerated. Chilly temperatures convert the starch in potatoes to sugar, which modifications the flavour and causes issues throughout cooking, notably for frying and roasting. A cool darkish pantry between 45 and 55 levels Fahrenheit is the precise place. Cooked potatoes have to be refrigerated and used inside 3 to five days. Foil-wrapped baked potatoes want the foil eliminated earlier than going within the fridge.
For storage occasions and spoilage indicators, see our companion submit Do Potatoes Go Dangerous? or browse the total Meals Storage Information.
Key Takeaways
- Complete uncooked potatoes: cool darkish pantry, not the fridge
- Refrigerating uncooked potatoes converts starch to sugar, ruining frying and roasting high quality
- Exception: in case you solely boil or mash, refrigeration is protected and extends shelf life
- Cooked potatoes: have to be refrigerated inside 2 hours, use inside 3 to five days
- Foil-wrapped baked potatoes: take away the foil earlier than refrigerating
- Minimize uncooked potatoes: refrigerate submerged in chilly water, use inside 24 hours
- Uncooked potatoes don’t freeze effectively; cooked potatoes freeze for as much as 12 months
Why Complete Uncooked Potatoes Ought to Not Go within the Fridge
Refrigerating entire uncooked potatoes feels just like the protected, good selection. It’s the improper one for many conditions, and for a particular chemical motive.
When potatoes are saved beneath 42 levels Fahrenheit (6 levels Celsius), which incorporates the temperature vary of most residence fridges, a course of known as chilly sweetening happens. The chilly triggers enzymes within the potato to transform saved starch into decreasing sugars, primarily glucose and fructose. This makes the potato style sweeter than anticipated, which sounds innocent. The issue reveals up throughout cooking.
When a potato with elevated sugar content material is uncovered to excessive warmth, the sugars react with amino acids in a course of known as the Maillard response, which causes the potato to brown excessively and inconsistently earlier than it’s cooked by way of. Refrigerated potatoes which can be fried or roasted flip darkish brown and even black on the skin whereas remaining undercooked inside. Industrial fry and chip producers rigorously management storage temperatures particularly to restrict chilly sweetening, which is why refrigerating uncooked potatoes at residence causes this browning downside for high-heat functions.
For boiling and mashing, chilly sweetening doesn’t matter. The additional sweetness is essentially undetectable in mashed potatoes and the browning response doesn’t happen in boiling water. In the event you solely ever boil or mash your potatoes, refrigerating entire uncooked potatoes is protected and does prolong shelf life meaningfully.
The place Complete Uncooked Potatoes Ought to Be Saved
The best storage setting for entire uncooked potatoes is cool (45 to 55 levels Fahrenheit), darkish, and well-ventilated. A pantry, cabinet, basement, or cellar that stays on this temperature vary is the precise alternative. A paper bag, wire basket, or cardboard field offers the airflow they want. Don’t use plastic luggage, which entice moisture and speed up mildew development and sprouting.
The darkness issues as a lot because the temperature. Gentle publicity triggers the manufacturing of chlorophyll and solanine, the pure toxin that offers green-skinned potatoes their security concern. A bag of potatoes left on a shiny counter or close to a kitchen window can start greening inside days.
Don’t wash potatoes earlier than storing them. Moisture on the pores and skin accelerates decay and sprouting. Wash solely if you end up able to cook dinner.
Cooked Potatoes Should Be Refrigerated
As soon as a potato is cooked, the fridge turns into necessary. Cooking introduces moisture and warmth that make the potato a probably hazardous meals, per Michigan State College Extension. The 2-hour rule applies: cooked potatoes left at room temperature for greater than two hours ought to be refrigerated instantly or discarded.
Retailer cooked potatoes in an hermetic container within the fridge and use inside 3 to 4 days per the USDA FoodKeeper app. This is applicable to all types: baked, boiled, mashed, roasted, or scalloped. Cooked potatoes ought to be cooled as shortly as attainable earlier than refrigerating. For giant portions of mashed or roasted potatoes, unfold them in a shallow container to hurry cooling.
The Foil-Wrapped Baked Potato Warning
That is a very powerful meals security level on this submit and the one most individuals miss. A baked potato wrapped in aluminum foil and left to chill creates a heat, moist, low-oxygen setting after the oven is turned off. These are the circumstances that permit Clostridium botulinum spores to germinate and produce botulinum toxin. Foil-wrapped baked potatoes have been related to botulism outbreaks and are flagged particularly by the USDA and Michigan State College Extension as a meals security danger.
The repair is straightforward: take away the foil earlier than placing the potato within the fridge. Retailer the potato in an hermetic container or wrap it loosely in plastic wrap as an alternative. Refrigerate inside two hours of cooking. Don’t go away a foil-wrapped baked potato on the counter in a single day, even in case you plan to refrigerate it within the morning.
By no means Depart These at Room Temperature
- Cooked potatoes in any kind: 2-hour restrict. Refrigerate or discard.
- Foil-wrapped baked potatoes: Take away foil earlier than refrigerating. Don’t go away wrapped in a single day.
- Minimize uncooked potatoes out of water: They oxidize and degrade shortly. Submerge in chilly water and refrigerate instantly.
- Potato salad or potato-based dishes with mayonnaise or dairy: 2-hour restrict applies to the entire dish.
See additionally
Fast Storage Reference
- Complete uncooked potato: Cool darkish pantry or cabinet, paper bag or basket, 3 to five weeks. Not the fridge (until solely boiling or mashing).
- Minimize uncooked potato: Submerged in chilly water, hermetic container, fridge. Use inside 24 hours.
- Baked potato: Take away foil, hermetic container or unfastened plastic wrap, fridge inside 2 hours. Use inside 3 to 4 days.
- Mashed potato: Hermetic container, fridge inside 2 hours. Use inside 3 to 4 days. Freeze as much as 12 months.
- Roasted or boiled potato: Hermetic container, fridge inside 2 hours. Use inside 3 to 4 days.
Why the Pantry Works for Complete Potatoes
Potatoes are underground tubers that advanced to be saved in cool, darkish, steady circumstances by way of the winter. Their pores and skin is a pure barrier towards moisture loss and light-weight publicity. The best residence storage temperature (45 to 55 levels Fahrenheit) is colder than most kitchens however hotter than most fridges, which is why a basement, cellar, or inside pantry away from warmth sources is the best choice most residence cooks have. Correct curing after harvest (drying and toughening the pores and skin) is why farm-fresh or farmers market potatoes usually last more than grocery store ones, which can have been saved in industrial chilly storage and partially sweetened earlier than reaching your kitchen.
Additional Studying
Do Potatoes Must Be Refrigerated FAQ
I already refrigerated my uncooked potatoes. Are they ruined?
For frying or roasting, sure, the standard has been affected. The chilly sweetening course of begins shortly at fridge temperatures, and the ensuing elevated sugar content material will trigger the potatoes to brown inconsistently and excessively at excessive warmth. For boiling or mashing, they’re nonetheless wonderful. The sweetness from chilly sweetening is essentially undetectable in mashed potatoes. If you’ll want to fry or roast them, deliver them to room temperature for half-hour earlier than cooking and be ready for some additional browning.
Can I go away a baked potato out in a single day?
No. A baked potato left at room temperature for greater than two hours ought to be discarded. If it was wrapped in foil, the chance is greater as a result of the foil creates a low-oxygen setting after cooking that may help Clostridium botulinum development. Take away the foil, refrigerate inside two hours of cooking, and the potato is protected for 3 to 4 days within the fridge.
Why did my fried potatoes flip black?
Virtually definitely as a result of the potatoes had been refrigerated earlier than frying. Chilly sweetening converts potato starch to glucose and fructose. When these sugars hit the excessive warmth of frying oil, they caramelize and burn by way of the Maillard response earlier than the potato is cooked by way of, producing darkish brown or black coloring on the skin. The potatoes usually are not spoiled, however the high quality is compromised. Subsequent time, retailer uncooked potatoes in a cool pantry and convey them to room temperature earlier than frying.
How lengthy can minimize potatoes sit in water within the fridge?
As much as 24 hours. Submerging minimize uncooked potatoes in chilly water and refrigerating them prevents the enzymatic browning that happens when the minimize floor is uncovered to air. After 24 hours, the potato begins dropping starch and taste into the water and the feel begins to degrade. For greatest outcomes, minimize and water-store potatoes the evening earlier than you propose to cook dinner them and use them inside that window. Change the water as soon as if storing for the total 24 hours.
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