I do love flat iron!
Question. I've always though the flat iron to be one of the most beef flavored cuts and potentially tender cuts out there, therefor I only ever hit it with some salt n pepper.
I can see the rub working out well, but does the marinade impact the tenderness? Also how do you cook them?
I like to hit w/ salt, pepper, and cast iron. 45 sec at high temp on one side, flip and get into the broiler for a min and a half. Rest, slice, eat.