Sharp, tangy condiment from ground mustard seeds. Essential for dressings, marinades, and sandwich spreads.
Substitutes
Horseradish — 1:1 (prepared horseradish for prepared mustard). Horseradish shares the sharp, sinus-clearing heat of mustard. Prepared horseradish is the closest match.
Dijon Mustard — 1:1. Dijon is one of the closest ready-made swaps for generic prepared mustard. It is sharper and less sweet, but it works across dressings, marinades, and sandwiches.
Mayonnaise — 1:1 (for sandwich spread). Mayonnaise is creamy without mustard's sharpness. Different flavor but fills the spread role.
Wasabi — 1/2 tsp wasabi per 1 tsp mustard (start small). Wasabi provides similar nasal heat. Very potent — use sparingly. Works best as a condiment or in dressings.
Tomato Ketchup — 1:1 (as condiment substitute). Sweet instead of sharp but fills the condiment role. Common alternative for hot dogs and burgers.