Maple Syrup
The answer
Opened maple syrup keeps indefinitely in the fridge. Mold on the surface can be skimmed — but discard if it returns quickly.
Caution Refrigeration prevents surface mold. If mold appears, skim and reheat to a brief boil — or discard if unsure.
How long it keeps
Fridge (40°F) Indefinite (opened) safe window
Freezer (0°F) Indefinite best quality
Room temp Refrigerate after opening then discard
Discard Discard if fermented, fizzy, or repeatedly moldy after skimming.
The answer
Unopened maple syrup keeps indefinitely in the pantry if sealed and stored cool.
How long it keeps
Fridge (40°F) Not needed safe window
Freezer (0°F) Indefinite best quality
Pantry Indefinite (unopened) OK stored right
Discard Discard leaking or bulging containers.
By state & packaging
State Fridge Freezer
Opened, refrigerated Indefinite Indefinite
Unopened, pantry — —
Signs it has gone bad
✕ Surface mold
✕ Fermented or boozy smell
✕ Fizzing on opening
FAQ
Is mold on maple syrup dangerous?
Skim mold and briefly boil the syrup — many producers say it is still usable. If mold returns quickly or the syrup smells fermented, discard it.