The Indian subcontinent they are often used whole, and are quickly fried in oil until they pop to impart a flavor to the oil.. The spice is widely used for its flavor and aroma in the food processing industry. Mustard oil can be extracted from the seeds. The seeds, particularly the white ones are ground into flour and is mixed to a thick paste with a little water to make the condiment mustard. Mustard oil is widely used to cook lot of eatables and dishes. Whole white mustard seed is used in pickling spice and in spice mixtures for cooking meats and seafood. Powdered mustard acts as an emulsifier in the preparation of mayonnaise and salad dressings. Powdered mustard is also useful for flavoring barbecue sauces, baked beans, many meat dishes, deviled eggs, beets and succotash. There are many ready-made mustards from mild and sweet to sharp and strong. They can be smooth or coarse and flavored with a wide variety of herbs, spices and liquids.