Saure Zipfel or Blaue Zipfel is a typical dish of the cuisine of Franconia and Upper Palatinate. It consists of Bratwurst cooked in vinegar.
To prepare the dish, onions, vinegar, white wine and spices (bay leaves, pepper, clove and juniper berries) are cooked together. Then the raw Bratwürste are added and are simmered on low heat. During this process, they become a pale blue that gives the dish its name. They are served in the brew with bread, bread rolls or pretzels.