Spit-roasted Lamb Recipe

Prepare the lamb

If not already prepared, have your butcher butterfly and loin-tie the lamb for even rotation on the spit. Remove excess fat pockets but leave a thin fat layer to baste the meat as it cooks. Pat the lamb dry with paper towels.

Season cavity and surface

Using half the kosher salt (3 tbsp) and half the black pepper (1.5 tbsp), season the interior cavity and the surface evenly. Tuck halved garlic cloves and several rosemary sprigs into the cavity and along the loin. Use butcher's twine to truss any loose legs or flaps so the lamb sits balanced on the spit.

Skewer on spit

Slide the spit rod through the center of the lamb lengthwise. Secure the lamb with the spit forks on both sides; tighten and use butcher's twine to further secure limbs and prevent shifting. Counterbalance the spit if your rotisserie requires it so rotation is smooth and even.

Make the basting marinade

In a bowl or large jar, whisk together the olive oil, lemon juice, white wine, smoked paprika, ground cumin, dijon mustard, honey, chopped oregano/thyme, red pepper flakes, remaining kosher salt (3 tbsp) and black pepper (1.5 tbsp). Crush or finely mince the remaining garlic cloves and stir into the mixture.

Initial soak (optional)

If time allows and the lamb is small enough to handle, remove from spit for a few hours and marinate in the mixture overnight in a cooler or fridge (covered). For whole spit roasting, you can instead brush the lamb thoroughly with the marinade and let it rest 1–3 hours at cool room temperature before cooking.

Baste during cooking

Reserve about 1 cup of the marinade for finishing. During roasting, baste the lamb every 20–30 minutes with the marinade using a heatproof brush or ladle. Start basting after the first 30–45 minutes once the surface has begun to brown to avoid burning sugars too early.

Preheat and arrange fuel

Preheat your charcoal or wood fire until you have steady medium coals — aim for indirect heat around the lamb rather than high direct flames. For a 20–25 lb lamb, set coals/wood banks on either side so the meat rotates over ambient heat, not sitting directly above intense flames. Target an ambient roasting temperature near 300–325°F (150–160°C).

Begin rotisserie cooking

Set the spit into the rotisserie assembly and begin turning at a steady slow speed (about 2–4 RPM depending on your equipment). Monitor heat and adjust coals or vents to maintain even temperature. Insert the meat thermometer into the thickest part of the leg or shoulder, avoiding bone.

Cook to temperature

Roast until the internal temperature reaches: 125–130°F (51–54°C) for rare, 135°F (57°C) for medium-rare, 150°F (66°C) for medium. For whole lamb served medium-rare to medium, expect 3.5–5 hours depending on size and ambient heat. Rotate continuously; maintain even basting. If flare-ups occur, move coals or temporarily shield the lamb until flames subside.

Finish and rest

In the final 15–20 minutes, baste with the reserved cup of marinade and increase heat slightly (closer coals) for a short period to develop crisp, golden skin, watching carefully to prevent burning. When the desired internal temperature is reached, remove the lamb from the spit using heat-proof gloves, transfer to a large carving table or tray, and tent loosely with foil. Rest for 20–30 minutes to allow juices to redistribute.

Carve and serve

Remove butcher's twine and carve the lamb into portions: separate legs, shoulders, loins, and ribs, then slice across the grain. Serve with lemon wedges and chimichurri or minted yogurt sauce. Offer flatbreads or roasted vegetables alongside. Spoon any collected pan juices or remaining marinade (boiled briefly to ensure safety) over slices as desired.

Leftovers can be refrigerated for up to 3–4 days and used in sandwiches, tacos, or reheated gently to preserve tenderness.