Skirt vs Top Sirloin — What's the Difference?
Quick Answer
Skirt (skirt steak) and Top Sirloin (top sirloin) are not the same cut: Skirt is plate primal (diaphragm (inside/outside skirt varies by spec)); Top Sirloin is sirloin primal (Upper hip, above the sirloin cap (coulotte) and behind the short loin).
Canonical entities: Skirt · Top Sirloin
Side-by-side
| skirt | top sirloin | |
|---|---|---|
| Primal | plate | sirloin |
| Muscle / location | diaphragm (inside/outside skirt varies by spec) | Upper hip, above the sirloin cap (coulotte) and behind the short loin |
| Character | Plate primal diaphragm muscle; very beefy, used for fajitas and grilling. | 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
- Different primals: plate vs sirloin.
- 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
Skirt
Pick Skirt when you want its specific marbling/texture profile: Plate primal diaphragm muscle; very beefy, used for fajitas and grilling.
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.
Skirt and Top Sirloin are different canonical muscles/primals: Skirt is plate (diaphragm (inside/outside skirt varies by spec)); 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: skirt (what-is) · top sirloin (what-is) · skirt hub · top sirloin hub