What is Kali Sarso(Indian Name)? Mustard seeds come in mainly two varieties: yellow mustard which has a slightly pungent flavor and second, black mustard which has a strong flavor. Although, there is good use all varieties of mustard seeds in Indian cooking. The black mustard seeds themselves come in so many varieties that differ in size and darkness from the skin. However, depending on the variety, mustard seeds are added to pickles, put whole or paste into curries, but probably the most common way they are used in Indian cooking is hot. Moreover, it is quickly cooked in clarified butter or oil along with a few other ingredients and added to lentil soups, yogurt dressings and toppings, etc.