Raw Bratwurst Raw Bratwurst are pink in color. Grilling them in their raw form requires skill because they must be fully cooked inside without burning the outside. One recommendation is to cook the Bratwurst in hot (not boiling) water for 5-10 minutes. Once fully cooked inside, brown the outside of the Bratwurst on the grill or in a pan. To grill the Bratwurst in their raw form without pre-cooking, grill them over low heat and frequently spritz them water or beer to cool the skin and prevent burning.