Mustard is a condiment made from the seeds of a mustard plant (white or yellow mustard, Sinapis hirta; brown or Indian mustard, Brassica juncea; or black mustard, B. nigra).

The whole, ground, cracked, or bruised mustard seeds are mixed with water, salt, lemon juice, or other liquids, and sometimes other flavorings and spices, to create a paste or sauce ranging in color from bright yellow to dark brown. The tastes range from sweet to spicy.[1]

Commonly paired with meats and cheeses, mustard is a popular addition to sandwiches, salads, steaks, tofu, yogurt, hamburgers, corn dogs, and hot dogs. It is also used as an ingredient in many dressings, glazes, sauces, soups, and marinades; as a cream or a seed, mustard is used as a condiment and in the cuisine of India and Bangladesh, the Mediterranean, northern and southeastern Europe, Asia, the Americas, and Africa,[2] making it one of the most popular and widely used spices and condiments in the world.