How Do You Know When Dijon Mustard Is Bad?
Dijon mustard can go bad if it’s not stored properly or for too long. The first thing to look for is discoloration or a change in texture. If the mustard has turned brown or gray and has a grainy or separated texture, it’s likely gone bad. Smell and taste are also important indicators. If the mustard has a sour or off smell, or if it tastes rancid or overly acidic, it’s time to toss it out.