Cut no. 9 · Brazilian · Flank
Aba do filé is the flank (vazio): the belly wall just behind the last rib, below the striploin. It's a thin cut with long fibers, a pronounced flavor and plenty of membrane, best in stews, the pressure cooker and slow roasts. The lower, rear part of the flank is the fraldinha (flap steak).
Beef cuts on a map: where each cut is, what other countries call it and how to cook it.