Piquant and zingy mustard has been used as a condiment for thousands—literally, thousands—of years, as ancient Sumerians were grinding their local seeds to paste in 4000 B.C. The primary ingredient in mustard is, of course, mustard seed; depending on how much heat you want, you can choose between Yellow, Brown, and Black Mustard Seeds. Then you rely on liquids like vinegar, water, or beer, and a supporting cast of seasonings, to define a mustard’s personality. With a handful of mustard basics, you can learn how to make your own version of one of America’s favorite condiments.