Flat Iron Steak | USDA PrimeEconomical, tender, delicious The Flat Iron steak may be the best cut of beef to grill, heck it may be the best cut overall. This relatively unknown cut of beef (although gaining popularity) is the result of research by teams from the University of Florida and the University of Nebraska as part of the Beef Checkoff program. The goal was to look for additional opportunities to add value to beef through development of new beef cuts clearly, they