Bratwurst is a common type of sausage in the United States, especially in the midwestern region where German immigrants brought this style of sausage-making with them. It is a casing sausage usually made from coarsely ground pork, but it may be made from chicken, turkey, veal, beef, or a combination of meats. The bulk sausage can also be shaped into a patty without a casing. Seasoned with salt and ground white pepper, bratwurst can also include spices such as coriander, caraway, allspice, marjoram, sage, and cayenne pepper. Variations include cheddar brats, spicy brats, and smoked brats. Variations are only limited to the imagination and taste of the butcher producing the sausage. While many higher-quality bratwurst tend to contain 80 percent lean pork, by U.S. federal standards, bratwurst may contain up to 50 percent fat.