Flank vs Tenderloin — What's the Difference?
Quick Answer
Flank (flank steak) and Tenderloin (beef tenderloin) are not the same cut: Flank is flank primal (abdominal flank steak); Tenderloin is loin primal (psoas major).
Canonical entities: Flank · Tenderloin
Side-by-side
| flank | tenderloin | |
|---|---|---|
| Primal | flank | loin |
| Muscle / location | abdominal flank steak | psoas major |
| Character | Long, fibrous abdominal cut; benefits from slicing across the grain. | Most tender muscle of the loin; center cuts often sold as filet mignon. |
Key differences
- Different primals: flank vs loin.
- 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
Flank
Pick Flank when you want its specific marbling/texture profile: Long, fibrous abdominal cut; benefits from slicing across the grain.
Tenderloin
Pick Tenderloin when its primal/muscle traits fit the dish: Most tender muscle of the loin; center cuts often sold as filet mignon.
Flank and Tenderloin are different canonical muscles/primals: Flank is flank (abdominal flank steak); Tenderloin is loin (psoas major).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: flank (what-is) · tenderloin (what-is) · flank hub · tenderloin hub