Because flat iron steak comes from the chuck region, it’s not a super expensive steak. Despite that, it has the quality of a very expensive cut of meat. Flat iron steak has a rich, beefy flavor. Because it’s a relatively well-marbled cut, it’s more flavorful than the lean steak cuts, including sirloin. It is one of the most tender steak cuts you can buy. Steak lovers say it has a silky smooth texture, or a “fork-tender texture.” The best way to cook a flat iron steak is on a grill or in a cast-iron skillet. Season it with kosher salt and some freshly ground black pepper. Use cooking oil to sear it. Alternatively, marinating flat iron steak is excellent for adding extra flavor and tenderness. However, since the steak has a muscular structure, it’s best not to cook it past medium. Medium-rare is optimal.