Rack of Lamb

The rack of lamb is the rib section of the forequarter, comprising the longissimus dorsi—the same muscle that gives beef its prized ribeye—and the rib bones that cradle it. A full American rack contains 7–8 ribs, running from thoracic vertebrae 6 through 12, and weighs roughly 1–1½ pounds per rack. This cut commands premium prices because it represents only a small fraction of the carcass, yet it offers exceptional intramuscular marbling and a buttery, concentrated lamb flavor that few cuts can match. The fat cap, a thin layer atop the muscle, bastes the meat during roasting and is central to keeping the rack moist—trim it before serving for a cleaner look, but never cook the rack without it unless you are searing and braising. French-trimming, the technique of scraping the intercostal meat and silver skin from the exposed bone tips, transforms the rack into an elegant handle for the table; it is labor-intensive but purely cosmetic, developed in French kitchens to allow guests to grip the bone when eating. A properly roasted rack at 130–135 °F presents a blush-pink center with a mahogany crust, delivering the ideal balance of richness and lamb's distinctive mineral, grassy notes. Spring lamb, from animals typically slaughtered at under a year of age, provides the most tender meat with the mildest flavor; older lamb develops more robust, iron-forward character that some cooks prefer.