What Is Mutton?
Mutton is meat from a sheep that's at least two to three years old, as opposed to lamb, which comes from sheep under a year old. It has a deeper red color, coarser grain, and a much stronger, gamier flavor than lamb.
More detail
The distinction between mutton and lamb is entirely about the animal's age at slaughter. Lamb is meat from young sheep, prized for its mild flavor and tenderness. Mutton comes from mature sheep that have often been kept for wool or breeding before being sent to slaughter, which means the muscle has developed more, the fat is firmer and more strongly flavored, and the connective tissue is tougher. Because of that toughness, mutton generally needs long, slow, moist cooking methods like braising or stewing to break down the collagen into gelatin, rather than the quick grilling or roasting suited to lamb chops or racks.
Where it's used
Mutton is central to South Asian, Middle Eastern, Caribbean, and British cooking, where it shows up in curries, biryanis, stews, and roasts. In the UK, mutton was once the default sheep meat before lamb became more commercially favored; in South Asian cuisines, 'mutton' is often used broadly to mean goat meat as well as sheep meat, so recipes labeled mutton curry may call for either.
Substitutes
Lamb shoulder or leg is the closest substitute, though it cooks faster and has a milder flavor, so braising times should be shortened and seasoning may need to be more assertive to compensate.
FAQ
Is mutton the same as goat meat?
No, though the terms are sometimes used interchangeably in South Asian recipes. Mutton is technically sheep meat; goat meat is a separate product, sometimes called chevon, with a leaner texture and slightly different flavor.
Why does mutton taste stronger than lamb?
Older sheep have had more time to develop intramuscular fat and connective tissue, both of which carry more flavor compounds than the leaner, softer tissue of young lambs.
How long does mutton need to cook to become tender?
Bone-in mutton cuts typically need 2 to 3 hours of slow braising or stewing at a low simmer to break down the tough collagen into tender, gelatinous meat.
Can mutton be grilled like lamb chops?
It's not recommended. Mutton's tougher muscle fibers stay chewy under quick high-heat cooking; it performs best in curries, stews, and pot roasts where liquid and time do the work.