Mich. Comp. Laws § 289.7127

Sec. 7127. "Meat pattie" is a product prepared in pattie form. "Meat pattie mix" is a product sold in bulk uncooked form. Meat patties and meat pattie mix are a mixture of fresh comminuted meat with or without the addition of fat and seasonings and containing not less than 65% meat. Binders and extenders may be used up to 12% of the finished product. Meat pattie and meat pattie mix shall not contain artificial color or flavor, by-products or variety meats, added water or ice, or more than 30% fat. Meat patties and meat pattie mix with fruits, vegetables, nuts, or mushrooms, either as a coating or ingredient, are permitted if labeled and advertised as "meat patties with _______", inserting the common or usual name of the addition.