How long is syrup good for after expiration date?

Pure maple syrup and unopened commercial pancake syrups can remain safe and flavorful long past their printed expiration dates. Unopened pure maple syrup stored in glass can last indefinitely in a cool, dark place. Once opened, pure maple syrup should be refrigerated and typically lasts 1 to 2 years.

Commercial pancake syrups made with corn syrup stay fresh unopened for 1 to 2 years past the expiration date, and last about 1 year in the pantry after opening. If pure maple syrup develops surface mold, skim the top, boil the syrup, and store in a clean container. If any syrup smells sour or fermented, discard it.