The T-bone and porterhouse are steaks of beef cut from the short loin. Both steaks include a "T-shaped" bone with meat on each side. Porterhouse steaks are cut from the rear end of the short loin and thus include more tenderloin steak, along with a large strip steak. T-bone steaks are cut closer to the front, and contain a smaller section of tenderloin.
USDA Prime Creekstone All Natural T-Bone Steak