lamb Rib
Rack of Lamb
The rib section left in one piece: a single continuous eye of muscle running along a row of rib bones. It sits in the same place on a lamb that a prime rib does on a steer, and cutting between the bones turns it into rib chops.
In one line
The bones get scraped clean for the photograph, not for the flavour.
Buy it if
You want one piece of meat that looks like an occasion and still cooks in half an hour.
Frenching is the scraping of meat and membrane off the last inch or two of each bone so the ends come out clean and white. It is presentation and nothing else — an unfrenched rack tastes identical, and the scraps that come off are perfectly good meat. If you are buying from a counter, ask for them. It is also worth doing the arithmetic the sticker hides: racks are sold by weight, bone included, so the cleaner and more elegant the rack looks, the more you have paid per ounce you can actually eat.
Structurally a rack is a lean eye with its fat on the outside rather than running through it, and that one fact dictates everything about cooking it. There is very little inside the muscle keeping it moist, so the cap has to do the work, and past medium there is nothing left to give. Score the cap in a crosshatch before it goes near heat so it renders evenly instead of contracting and bowing the rack out of shape, and keep the bones angled away from the fiercest heat — they char, and they will not tell you anything useful about the middle.
One thing to check before you buy: whether the chine — the section of backbone at the base of the ribs — has been sawn off. On a rack that still has it, a knife cannot pass between the ribs, and you will be standing over a finished roast trying to hack it apart while it goes cold. Most racks sold at retail are already chined. Ask if you are not sure, because it is a saw job, not a knife job.
Where it comes from on the animal
| Species | lamb |
|---|---|
| Primal | Rib |
| Subprimal | Rib section, loin eye on the bone |
What else it’s called
How to cook Rack of Lamb
| Best methods | Oven roast Reverse sear Grill Sear Smoke |
|---|---|
| Skip | Braise |
| Cook to | 130–135°F at the thickest point of the eye, rested a full ten minutes before carving. |
| Marbling & flavor | Light marbling inside the eye. What makes a rack rich is the cap on the outside, which bastes the muscle as it renders — the fat is around the meat rather than in it. |
Rack of Lamb vs Lamb Loin Chops
Cut a rack between every bone and you have rib chops, which sit next to loin chops in the case at similar prices. The difference is what is on the bone: a rib chop is one round eye, a loin chop is a T-bone carrying the loin and a piece of tenderloin.
| Rack of Lamb | Lamb Loin Chops | |
|---|---|---|
| Sold as | A whole roast, or cut into rib chops | Individual chops |
| Bone | One long rib bone per chop | T-bone through the middle |
| Muscles | A single eye | Loin eye plus tenderloin |
| Best cooked | Roasted whole, carved | Seared as chops |
If Rack of Lamb is sold out
Closest match
Lamb Loin Chops
Same heat, same temperature, less ceremony — and more meat per chop, since a loin chop carries the tenderloin too.
Cooks like
Lamb Loin Roast
The other lamb roast you take to medium-rare and carve. Boneless, so it slices cleanly and feeds more people per pound.
If you want cheaper
Lamb Forequarter
A shoulder roast costs a fraction of a rack and has more flavour, but it needs hours rather than half an hour.
Common questions
How many people does a rack feed?
A whole rack normally carries seven or eight ribs and serves two or three as a main, at three to four chops each. Racks do not come in larger sizes — a lamb only has so many ribs — so for more than four people, buy two.
What is a crown roast?
Two racks bent into a circle with the bones pointing up and tied together, so the whole thing looks like a crown. Same meat, same cooking, with one catch: the ring shape means the outside cooks faster than the inside, so check the temperature in more than one place.
Should I leave the fat cap on?
Yes. The eye is lean, and the cap is both what keeps it moist and where nearly all of lamb's flavour is concentrated. Score it, start the rack fat side down in a hot pan to get the rendering underway, and only then move it to the oven.
How do I know when it is done without cutting into it?
A thermometer pushed into the thickest part of the eye from the end of the rack, kept clear of the bones — bone reads hotter than the meat around it and will tell you the roast is done before it is. Timing rules fail here because racks vary a great deal in thickness.