Inside Skirt vs Top Round Steak — What's the Difference?
Quick Answer
Inside Skirt (inside skirt steak) and Top Round Steak (top round steak) are not the same cut: Inside Skirt is plate primal (Transversus abdominis muscle — the inner diaphragm muscle); Top Round Steak is round primal (Steak cut from the inside round / top round).
Canonical entities: Inside Skirt · Top Round Steak
Side-by-side
| inside skirt | top round steak | |
|---|---|---|
| Primal | plate | round |
| Muscle / location | Transversus abdominis muscle — the inner diaphragm muscle | Steak cut from the inside round / top round |
| Character | The 'other' skirt steak. Thinner, wider, and slightly tougher than the outside skirt (which is the standard 'skirt steak'). Most restaurant fajitas use inside skirt because the outside skirt is exported or sold at premium. Requires high heat, fast cooking, and slicing against the grain. | A lean, affordable steak cut from the inside round. Often marketed as 'London Broil' in US supermarkets, though London broil is technically a preparation method, not a cut. Best when marinated, grilled to medium-rare, and sliced very thin against the grain. Overcooking makes it tough and dry. |
Key differences
- Different primals: plate 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
Inside Skirt
Pick Inside Skirt when you want its specific marbling/texture profile: The 'other' skirt steak. Thinner, wider, and slightly tougher than the outside skirt (which is the standard 'skirt steak'). Most restaurant fajitas use inside skirt because the outside skirt is exported or sold at premium. Requires high heat, fast cooking, and slicing against the grain.
Top Round Steak
Pick Top Round Steak when its primal/muscle traits fit the dish: A lean, affordable steak cut from the inside round. Often marketed as 'London Broil' in US supermarkets, though London broil is technically a preparation method, not a cut. Best when marinated, grilled to medium-rare, and sliced very thin against the grain. Overcooking makes it tough and dry.
Inside Skirt and Top Round Steak are different canonical muscles/primals: Inside Skirt is plate (Transversus abdominis muscle — the inner diaphragm muscle); Top Round Steak is round (Steak cut from the inside round / top round).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: inside skirt (what-is) · top round steak (what-is) · inside skirt hub · top round steak hub