Jump to recipe… iStockphoto by Getty ImagesFlat irons steaks, ready for the grill. You who sear steer meat are acquainted with Chuck, but generally steer clear of him in favor of Sir Loin, or Madame Filet Mignon, or other, more tender cuts of beef. However, inside of Chuck was always a soft heart; it just took a crafty butcher to find it. It’s called flat iron (because, not unlike our own, Chuck’s tender heart has the triangular shape of a clothes iron).