The AtlasFlat Iron (Top Blade / Oyster Blade)
richly marbled · clean beefy · versatile · smooth texture
About this cut
The Flat Iron is a butcher's masterpiece, sourced from the shoulder but offering a tenderness that rivals the tenderloin. Characterized by intense marbling and a uniform thickness, it provides a consistent and reliable experience for high-heat cooking. By removing the tough central connective tissue found in a traditional featherblade, the resulting steaks are succulent with a silky mouthfeel. It is a modern steakhouse favorite that balances deep, beefy flavor with exceptional textural refinement.
Taste-DNA
This cut is the Infraspinatus muscle located on the shoulder blade, which remains remarkably tender as it acts primarily as a stabilizer. The 'flat iron' specifically refers to the longitudinal removal of the internal tendon, yielding two clean, thin steaks perfect for quick searing.
Preparation
Cooking Guide
For the ultimate crust, use high-heat pan-searing or grilling to achieve a profound Maillard reaction while keeping the interior juicy. Target a core temperature of 52-54°C for medium-rare, allowing the fine intramuscular fat to render completely. Avoid overcooking beyond medium, as the lean fibers can toughen; always rest the meat for at least five minutes before slicing. Crucially, slice against the grain to maximize the perceived tenderness of the muscle fibers.
Core Temperatures
Portions per Person
Pair this clean, beefy cut with a mineral-driven Cabernet Franc or a medium-bodied Syrah to complement its richness without masking the texture. A finishing touch of fleur de sel and a dollop of bone marrow butter provides a luxurious, bistro-style elevation.