Flank vs Inside Round — What's the Difference?
Quick Answer
Flank (flank steak) and Inside Round (top round (inside round)) are not the same cut: Flank is flank primal (abdominal flank steak); Inside Round is round primal (Inner thigh of the hindquarter).
Canonical entities: Flank · Inside Round
Side-by-side
| flank | inside round | |
|---|---|---|
| Primal | flank | round |
| Muscle / location | abdominal flank steak | Inner thigh of the hindquarter |
| Character | Long, fibrous abdominal cut; benefits from slicing across the grain. | A large, lean cut from the inner thigh (adductor and semimembranosus muscles). Sold as top round steaks, London broil, or roasts. Lean but can be tough — best sliced thin or braised. |
Key differences
- Different primals: flank vs round.
- 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.
Inside Round
Pick Inside Round when its primal/muscle traits fit the dish: A large, lean cut from the inner thigh (adductor and semimembranosus muscles). Sold as top round steaks, London broil, or roasts. Lean but can be tough — best sliced thin or braised.
Flank and Inside Round are different canonical muscles/primals: Flank is flank (abdominal flank steak); Inside Round is round (Inner thigh of the hindquarter).
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) · inside round (what-is) · flank hub · inside round hub