The most tender skirt steak is the outside skirt steak.
It has a good marbling, which gives a beautiful flavor and keeps the meat juicy while it cooks.
Which is more tender flank steak or skirt steak?
Flank is more tender than the inside skirt. Outside skirt is more evenly matched and may even be more tender than a flank. Bear this in mind if tenderness is a big deal to you. You can tenderize these cuts with a mallet and by marinating in olive oil and citrus overnight.