Yellow Mustard Seed Brassica alba small 2mm round seed with mildly pungent flavor. Yellow mustard is not as hot as brown. An important spice the world over. In medieval Europe mustard was known as ‘eye of newt.’ To make the popular condiment yellow mustard it is combined with vinegar, turmeric, and other spices. It is also used in vinaigrettes, marinades, sauces, and pickling, and with seafood. Organically grown. Protective amber glass jar. kosher and pareve