When Does Syrup Go Bad?

The short answer is technically no, syrup does not expire and you can keep an unopened container of the stuff on your shelf indefinitely. That's due to the high sugar content of pure maple syrup, according to the experts at Ben's Sugar Shack, which produces syrup in New Hampshire.

How long does syrup last once opened?

After opening, genuine maple syrup should be stored in the refrigerator and will last about a year. Opened jugs of imitation maple syrup can be stored in the pantry for about a year.

How can you tell if syrup is spoiled?

How to tell if Syrup is bad, rotten or spoiled? It is the texture and color that will eventually change, it will not be harmful to consume but the flavor will be slightly compromised. When syrup has been around too long it will become thicker and darker than when purchased.