About: Flap steak

Flap steak, or flap meat (IMPS/NAMP 1185A, UNECE 2203) is a beef steak cut from the obliquus internus abdominis muscle of the bottom sirloin. It is generally very thin, fibrous and chewy, but flavorful, and often confused with both skirt steak and hanger steak. Flap steak is popular in Mexican cuisine, where it is known as "flap meat" in English. It is typically marinated in citrus juice and Mexican spices then grilled hot till charred on the outside, then diced or sliced thin and used in tacos, tortas, fajitas, and other dishes calling for thin beef steak.