USDA Choice beef flap meat sold in full cases averaging 70 lbs. Flap steak, also known as Bavette steak, comes from the bottom sirloin section and features long strands of loosely connected muscle fibers that deliver exceptional tenderness when sliced against the grain. This cut offers excellent beefy flavor and an open grain structure that readily absorbs marinades, making it ideal for fajitas, stir fries, and grilled applications. The Choice grade indicates high quality beef with good marbling for tenderness and flavor. This steak has been blade tenderized by Costco to increase tenderness and must be cooked to at least 145°F internal temperature for food safety. The versatile cut works well marinated and grilled, or sliced thin for Asian stir fry dishes with vegetables.