Flap Steak vs Petite Tender — What's the Difference?
Quick Answer
Flap Steak (flap steak (sirloin flap)) and Petite Tender (petite tender (teres major)) are not the same cut: Flap Steak is sirloin primal (Bottom sirloin, obliquus internus abdominis muscle); Petite Tender is chuck primal (Teres major muscle, tucked alongside the shoulder blade).
Canonical entities: Flap Steak · Petite Tender
Side-by-side
| flap steak | petite tender | |
|---|---|---|
| Primal | sirloin | chuck |
| Muscle / location | Bottom sirloin, obliquus internus abdominis muscle | Teres major muscle, tucked alongside the shoulder blade |
| Character | A thin, coarse-grained steak from the bottom sirloin. The American name for what the French call bavette d'aloyau. Open grain absorbs marinades extremely well. Popular for fajitas, stir-fry, and carne asada. Often confused with skirt steak but from a different location entirely. | A small, narrow muscle from the shoulder that resembles a miniature tenderloin in shape and tenderness. Only about 250-350g per side, making it one of the lowest-yield cuts on the animal. Extremely tender but relatively unknown outside professional kitchens. |
Key differences
- Different primals: sirloin vs chuck.
- Texture and slicing: compare fibrous, grain-heavy cuts vs more tender steak-style muscles based on each cut’s description.
- Retail naming diverges by country—always map through a canonical cut when translating menus or labels.
When to use each
Flap Steak
Pick Flap Steak when you want its specific marbling/texture profile: A thin, coarse-grained steak from the bottom sirloin. The American name for what the French call bavette d'aloyau. Open grain absorbs marinades extremely well. Popular for fajitas, stir-fry, and carne asada. Often confused with skirt steak but from a different location entirely.
Petite Tender
Pick Petite Tender when its primal/muscle traits fit the dish: A small, narrow muscle from the shoulder that resembles a miniature tenderloin in shape and tenderness. Only about 250-350g per side, making it one of the lowest-yield cuts on the animal. Extremely tender but relatively unknown outside professional kitchens.
Flap Steak and Petite Tender are different canonical muscles/primals: Flap Steak is sirloin (Bottom sirloin, obliquus internus abdominis muscle); Petite Tender is chuck (Teres major muscle, tucked alongside the shoulder blade).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: flap steak (what-is) · petite tender (what-is) · flap steak hub · petite tender hub