Per USDA FoodKeeper
On the counterCounter
Refrigerate
once opened
In the fridgeFridge
2–3 weeks
at or below 40°F (4°C)
In the freezerFreezer
Not listed
no FoodKeeper figure
On the counterCounter
10–12 months
cool, dry place
In the fridgeFridge
Not needed
shelf-stable
In the freezerFreezer
Not needed
keeps without freezing
Quick answer
Yes. Frosting lasts 2–3 weeks in the fridge. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if frosting is bad
Smell
Musty, sour or rancid odour.
Texture
Clumping from moisture, or a damp feel.
Pests
Webbing, holes, or tiny insects in the bag.
Flavour
Flat, stale or bitter taste — quality is gone even if it is safe.
Frosting past the expiration date
Unopened
FoodKeeper gives unopened frosting 10–12 months in the pantry, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Opened
Once opened, the printed date no longer applies. Count 2–3 weeks in the fridge from the day you open it.
How to keep frosting fresh longer
- Store in an airtight container in a cool, dark, dry place.
- Keep away from the stove and dishwasher, where heat and humidity speed spoilage.
- Write the opening date on the pack.
More about frosting
FAQ
How long does it take for frosting to go bad?
2–3 weeks in the fridge, per USDA FoodKeeper.
Can frosting expire?
FoodKeeper gives unopened frosting 10–12 months in the pantry, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
What happens if you eat bad frosting?
Usually an unpleasant taste rather than illness, but discard anything mouldy, rancid or smelling off.
How do you keep frosting from going bad?
Store in an airtight container in a cool, dark, dry place.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number