What to look for
Classic Dijon is smooth and wine-vinegar sharp; whole-grain mustard is more textured. Check labels for wine, sulfites, or added flavors when relevant.
Store it thoughtfully
Refrigerate after opening as directed and use a clean utensil. Stir any harmless separation back together.
How to use it
Whisk it with vinegar before slowly adding oil to help a vinaigrette emulsify. In cream sauces, add over moderate heat and taste before salting.
When you need a substitute
Yellow mustard is milder and more acidic; whole-grain mustard changes texture. Dry mustard powder is concentrated and needs liquid.
Substitutions change flavor, texture, and sometimes safety or structure. Check the recipe and product labels, especially for dietary needs.

