Flank steak is a long, flat cut from the abdominal muscles with a rich, beefy flavor. It is lean and used for fajitas, stir-fries, and as beef strips.| The Spruce Eats
Although tough and filled with connective tissue, skirt steak has a lot of intensely beefy flavor. It is a great steak for the grill.| The Spruce Eats