Prime Angus Ground Beef 80/20Our Prime, Angus Ground Beef with an 80 20 lean to fat ratio, vacuum sealed in one pound portions and prepared fresh upon ordering. To cook Prime Angus Ground Beef 80 20, start by heating a skillet over medium high heat. Add the ground beef, breaking it apart with a spatula. Cook until browned, about 710 minutes, stirring occasionally for even cooking. Drain excess fat if desired. Season to taste and ensure the internal temperature reaches 160F (71C)