The meat of choice for a classic Philly Cheesesteak is thinly sliced ribeye steak. Ribeye is well-marbled and tender when cooked, making it ideal for this sandwich. However, other cuts of beef can also be used, such as flank steak, top sirloin, top/eye of round, hanger steak, or wedge meat. These cuts may be less marbled and slightly tougher than ribeye, but they can still be used to make a delicious Philly Cheesesteak. When using leaner cuts, it is recommended to add a little extra oil on the cooking surface to prevent the meat from sticking.