'Prime' ground beef: worth it or gimmick ? in Cooking Posted May 26, 2013 The reason I buy a prime rib steak or strip is because I want marbling of fat to contribute flavor and mouth feel. This is totally irrelevant for ground meat because you can specify/add as much fat as you want. When I want good burgers I ask my butcher to grind a good looking piece of chuck (Choice) with added fat if I think it needs it. (If I want to be fancy I'll have him add some short rib or brisket to the mix.) Paying the prime premium for what will wind up to be hamburger is, IMHO, unnecessary.