It is believed that there are over 40 different mustard varieties but the varieties most familiar to people in the western world are categorized simply as black, brown, and white mustard. Food coloring or turmeric is added to the white variety to make what we know as yellow mustard. Black mustard seeds most likely come from the Mediterranean region, though in modern times they are mainly used in India. While mustard’s history goes all the way back to Ancient Egypt, the prepared version of it is a Roman invention. The ancient Romans ground mustard seeds and used them to make a paste with wine that was similar to the prepared mustard we use today.