Good question! Yellow and Dijon mustards are fridge-free heroes. They have enough vinegar and salt to party for years.
Mustard Storage Dilemma: Fridge Or Not? Expert Tips Revealed | CyCookery
But honey mustard is a traitor. It has sugar. It can get funky. That one actually needs the fridge. Sorry, honey lovers.
Also, whole-grain mustards are a gray area. Some say fridge, some say not. I say: if it’s fancy and has real wine in it, keep it cool. But your basic yellow squeeze bottle? Set it free.
