Sirloin Flap vs Top Sirloin — What's the Difference?
Quick Answer
Sirloin Flap (sirloin flap) and Top Sirloin (top sirloin) are not the same cut: Sirloin Flap is sirloin primal (sirloin flap / bottom sirloin flap); Top Sirloin is sirloin primal (Upper hip, above the sirloin cap (coulotte) and behind the short loin).
Canonical entities: Sirloin Flap · Top Sirloin
Side-by-side
| sirloin flap | top sirloin | |
|---|---|---|
| Primal | sirloin | sirloin |
| Muscle / location | sirloin flap / bottom sirloin flap | Upper hip, above the sirloin cap (coulotte) and behind the short loin |
| Character | Thin, loose-grained flap from the bottom sirloin; overlaps skirt/flank in some regional breakdowns. | A large, lean cut from the hip section. The top sirloin butt (NAMP 184) is the main muscle group. Versatile — grilled as steaks, roasted whole, or cut into kabobs. Moderate tenderness with good beefy flavor. Not to be confused with sirloin cap (coulotte/picanha) which sits on top of it. |
Key differences
- 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
Sirloin Flap
Pick Sirloin Flap when you want its specific marbling/texture profile: Thin, loose-grained flap from the bottom sirloin; overlaps skirt/flank in some regional breakdowns.
Top Sirloin
Pick Top Sirloin when its primal/muscle traits fit the dish: A large, lean cut from the hip section. The top sirloin butt (NAMP 184) is the main muscle group. Versatile — grilled as steaks, roasted whole, or cut into kabobs. Moderate tenderness with good beefy flavor. Not to be confused with sirloin cap (coulotte/picanha) which sits on top of it.
Sirloin Flap and Top Sirloin are different canonical muscles/primals: Sirloin Flap is sirloin (sirloin flap / bottom sirloin flap); Top Sirloin is sirloin (Upper hip, above the sirloin cap (coulotte) and behind the short loin).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: sirloin flap (what-is) · top sirloin (what-is) · sirloin flap hub · top sirloin hub