Do Mustard Seeds Go Bad?

Properly stored, mustard seed will generally stay at best quality for about 3 to 4 years. ... No, commercially packaged mustard seed does not spoil, but it will start to lose potency over time and not flavor food as intended - the storage time shown is for best quality only.

How can you tell if mustard has gone bad?

How can you tell if opened mustard is bad or spoiled? The best way is to smell and look at the mustard: if the mustard develops an off odor, flavor or appearance, or if mold appears, it should be discarded.

Does mustard really expire?

No, mustard doesn't go bad, but it can lose its flavor in the long run, or when not properly stored. Find out the shelf life of mustard, the signs of a mustard gone old, and how to keep the “kick” of its flavor.