Per USDA FoodKeeper
On the counterCounter
18–24 months
cool, dry place
In the fridgeFridge
Not needed
shelf-stable
In the freezerFreezer
Not needed
keeps without freezing
On the counterCounter
Indefinitely
cool, dry place
In the fridgeFridge
Not needed
shelf-stable
In the freezerFreezer
Not needed
keeps without freezing
Quick answer
Yes. Brown sugar lasts 18–24 months in the pantry. After that, or sooner if stored badly, it spoils: watch for the signs below.
How to tell if brown sugar 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.
Brown sugar past the expiration date
Unopened
Follow the package date. "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 18–24 months in the pantry from the day you open it.
How to keep brown sugar fresh longer
- Sugar never spoils, but for best quality use within 2 years of opening.
- Store in an airtight container in a cool, dark, dry place.
- Keep away from the stove and dishwasher, where heat and humidity speed spoilage.
More about brown sugar
FAQ
How long does it take for brown sugar to go bad?
18–24 months in the pantry, per USDA FoodKeeper.
Can brown sugar expire?
Follow the package date. "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 brown sugar?
Usually an unpleasant taste rather than illness, but discard anything mouldy, rancid or smelling off.
How do you keep brown sugar from going bad?
Sugar never spoils, but for best quality use within 2 years of opening.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number