Mustard flavor. Mustard flavor is some people like to smell mustard, called mustard flavor for mustard flavor. Mustard, also known as mustard seeds, Western yam cabbage, mustard powder, generally divided into two kinds of green mustard and yellow mustard. Yellow mustard originated in China, is the mustard seeds ground into; green mustard (green mustard spicy) originated in Europe, with horseradish (horse radish) manufacturing, add coloring was green, its spicy smell stronger than yellow mustard, and has a unique aroma.