Peanuts are a favorite food, whether eaten alone as a snack food or mixed into candy, cookies, pies, and other bakery products. Peanut butter, made by grinding the roasted seeds, accounts for about one half the peanuts grown in the United States. Worldwide however, peanuts are grown chiefly to provide peanut oil. Farmers in Africa and Asia grow about 90 percent of the world's peanuts. 