|Beef cut:||Bottom sirloin|
|Steak type:||Flap steak|
The flap steak is sometimes confused with hanger steak (IMPS/NAMP 140, UNECE 2180) as they both are thin and come from similar parts of the animal, most commonly cattle. The item consists of the obliquus internus abdominis muscle from the bottom sirloin butt. Sometimes mistakenly sold as Skirt steak.
- Green, Aliza (2005). Field Guide to Meat: How to Identify, Select, and Prepare Virtually Every Meat, Poultry, and Game Cut. Quirk Books. p. 320. ISBN 978-1-59474-017-6.
- Tara Duggan (Wednesday, 16 March 2005). "Butchers' best-kept secret / Seldom-seen flap meat is giving better-known steaks a run for the money". The San Francisco Chronicle. Retrieved 20 May 2013.