That said, here are the best estimates for how long to keep packets of various condiments: One year for mayo, relish, BBQ sauce, tartar sauce, horseradish sauce, maple syrup, salad dressings and ketchup. One to two years for olive oil, Parmesan cheese, taco sauce, mustard and soy sauce.

Do condiment packets expire?

Yes, they do go bad eventually. According to Atlas Obscura, the packets lose flavor over time, and they all do have expiration dates—they're usually just listed on the massive box sent to fast-food joints, not on individual packets. ...

How do you know if condiment packets are bad?

If it appears puffy or is damaged, toss it; When you open the packet, inspect it; If it has an odd color, texture, flavor, or odor, toss it. Condiments containing fats (mayo, butter) go rancid more quickly. Paper-based packets can spoil faster.