Flat Iron vs Hind Shank — What's the Difference?
Quick Answer
Flat Iron (flat iron steak) and Hind Shank (hind shank) are not the same cut: Flat Iron is chuck primal (Infraspinatus muscle, top blade of the shoulder clod); Hind Shank is shank primal (Rear leg, below the knee joint).
Canonical entities: Flat Iron · Hind Shank
Side-by-side
| flat iron | hind shank | |
|---|---|---|
| Primal | chuck | shank |
| Muscle / location | Infraspinatus muscle, top blade of the shoulder clod | Rear leg, below the knee joint |
| Character | The second most tender muscle on the entire animal, after the tenderloin. A flat, rectangular steak extracted from the top blade by splitting it along the central connective tissue. Uniform thickness makes it ideal for grilling. Also known as butler's steak in the UK. | Cross-cut sections of the rear leg bone with surrounding meat. Extremely tough and collagen-rich — produces deeply flavored broth when braised. Classic osso buco cut. One of the most universal braising cuts worldwide. |
Key differences
- Different primals: chuck vs shank.
- 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
Flat Iron
Pick Flat Iron when you want its specific marbling/texture profile: The second most tender muscle on the entire animal, after the tenderloin. A flat, rectangular steak extracted from the top blade by splitting it along the central connective tissue. Uniform thickness makes it ideal for grilling. Also known as butler's steak in the UK.
Hind Shank
Pick Hind Shank when its primal/muscle traits fit the dish: Cross-cut sections of the rear leg bone with surrounding meat. Extremely tough and collagen-rich — produces deeply flavored broth when braised. Classic osso buco cut. One of the most universal braising cuts worldwide.
Flat Iron and Hind Shank are different canonical muscles/primals: Flat Iron is chuck (Infraspinatus muscle, top blade of the shoulder clod); Hind Shank is shank (Rear leg, below the knee joint).
Choose based on tenderness, marbling, grain direction, and how you plan to cook (sear vs braise vs slice thin).
Read the full guides: flat iron (what-is) · hind shank (what-is) · flat iron hub · hind shank hub