In the freezer
1–2 months
Yes, short term
Quality holds for about 1–2 months at 0°F / -18°C. Frozen food stays safe indefinitely; only quality declines.
Quick answer
Yes: mashed potatoes keep 1–2 months in the freezer at 0°F (-18°C), compared with 3–4 days in the fridge.
How to freeze mashed potatoes
- Cool quickly: shallow containers, into the fridge or freezer within 2 hours.
- Portion into freezer bags or airtight tubs, leave headspace for liquids, and label with the date.
- Thaw in the fridge and reheat to 165°F (74°C) until steaming.
How to thaw mashed potatoes
In the fridge
Safest. Allow about 24 hours per 5 lb (2.3 kg); small packs thaw overnight. Once thawed, raw meat and seafood keep 1–2 extra days in the fridge.
In cold water
Seal it in a leak-proof bag and submerge; change the water every 30 minutes. Allow about 30 minutes per pound, then cook right away.
In the microwave
Use the defrost setting and cook immediately — parts of the food may start to cook.
Yes, short termQuality holds for about 1–2 months at 0°F / -18°C. Frozen food stays safe indefinitely; only quality declines.
Freezer vs fridge vs counter
Mashed potatoes Per USDA FoodKeeper
On the counterCounter
2 hours
1 hour if above 90°F
In the fridgeFridge
3–4 days
at or below 40°F (4°C)
In the freezerFreezer
1–2 months
at 0°F; quality, not safety
More about mashed potatoes
FAQ
How long can you freeze mashed potatoes?
About 1–2 months for best quality at 0°F (-18°C). Kept frozen, it stays safe longer, but texture and flavour fade.
How do you thaw frozen mashed potatoes?
Safest. Allow about 24 hours per 5 lb (2.3 kg); small packs thaw overnight. Once thawed, raw meat and seafood keep 1–2 extra days in the fridge.
Can you refreeze mashed potatoes?
Only if they were thawed in the fridge and have not been left out. Quality drops each time.
Does freezing kill bacteria in mashed potatoes?
No. Freezing pauses bacteria; they become active again as the food thaws. Cook or reheat to a safe temperature.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number