This is a premium American Wagyu Reserve beef loin top sirloin steak, sold per pound at Costco. American Wagyu cattle are raised in the United States from genetics crossbred with Japanese Wagyu breeds, producing enhanced intramuscular marbling, superior tenderness, and a rich, umami-forward flavor profile that surpasses conventional USDA grades. The "Reserve" designation indicates a select premium tier within the American Wagyu program.

The "cap off" designation means the sirloin cap muscle — also known as the picanha or coulotte — has been removed, leaving the lean, center-cut portion of the top sirloin. This results in a uniform, well-shaped steak with consistent texture throughout. The top sirloin is sourced from the loin primal, considered superior to the bottom sirloin, and delivers the signature firm bite characteristic of sirloin cuts while benefiting from the elevated marbling of American Wagyu genetics.

This lean yet flavor-rich steak is well suited for grilling, pan-searing with an oven finish, or cooking with a marinade of olive oil, soy sauce, balsamic vinegar, and garlic. It performs best cooked from rare to medium to preserve its natural juiciness and Wagyu character.