Foie gras is a food product made of the liver of a duck or goose that has been specially fattened. By French law, foie gras is defined as the liver of a duck or goose fattened by force-feeding corn with a gavage, although in Spain and other countries outside of France it is occasionally produced using natural feeding. Foie gras is a popular and well-known delicacy in French cuisine. Its flavor is described as rich, buttery, and delicate, unlike that of an ordinary duck or goose liver. Foie gras is sold whole, or is prepared into mousse, parfait, or pâté, and may also be served as an accompaniment to another food item, such as steak.