Honestly, before a few months ago, I had never heard of flap steak. but it was cheap and that was a good enough reason for me to try it. I assumed I would have to stew it for ages, like most cheap cuts. However, flap steak has quickly risen to my top favorite steak because it is super versatile. It can both be cooked fast (in a pan or on the grill) or slow (in a stew).