In general, pepperoni is made from ground pork and beef combined with seasonings and bacterial culture. This mixture is then put into a natural or artificial casing, such as cow intestines, before being dried and cured. In the United States, pepperoni must be made from either pork alone or a pork and beef mixture. Pepperoni made from only 100% beef must, by law, be labeled as \\"beef pepperoni\\".