Lamb · oven
Lamb Shoulder (Slow Roast)
Lamb Shoulder (Slow Roast)
cooking times
4 hr 35 min – 5 hr 50 min At the most common temperature, 300°F, a lamb shoulder runs about 4 hr 35 min – 5 hr 50 min at 5 lb. Pick your temperature below for the full chart. Done is always 145°F internal.
When is it actually done?
145°F internal The USDA FSIS safe minimum internal temperature for this cut is 145°F, followed by a rest of about 20 minutes. The clock estimates; the thermometer decides. Every time on this page is a planning range, not a doneness test.
Pull temperature vs safe temperature: Like pork shoulder, lamb shoulder is cooked far past its 145°F safe minimum — to roughly 190–200°F — so the connective tissue melts and the meat pulls apart with two forks.
Worth knowing before you start
- Cover for most of the cook (with a splash of liquid), uncover for the last 30–45 minutes to brown.
- Shoulder is the forgiving lamb cut — where an overcooked leg is dry, an 'overcooked' shoulder is simply more pullable.
- Fork-tender is the real finish line; the times get you close and the fork makes the call.