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Cooking Lamb.  Simple and Delicious.
Cooking lamb couldn’t get any easier!  Delicious in recipes or simply cooked on the grill, lamb is perfect for no-fuss weeknight meals.

To ensure lamb remains safe throughout cooking, the USDA* recommends cooking lamb patties and ground lamb mixtures, such as meat loaf, to a minimum internal temperature of 160°F as measured on a food thermometer.  However, whole muscle meats such as roasts, steaks, and chops may be cooked to 145°F (medium rare), 160°F (medium), or 170°F (well done).  For approximate cooking times for use in meal planning, see the chart below.

Times are based on lamb at refrigerator temperature (40°F).  Remember appliances and outdoor grills can vary in heat.  Use a food thermometer to check for safe cooking and doneness.

Cut of Lamb Size Cooking Method Cooking Time Internal Temperature
Lamb Leg, Bone In 5 to 7 lbs. Roast 325°F 20 to 25 min./lb.
25 to 30 min./lb.
30 to 35 min./lb.
Medium Rare 145°F
Medium 160°F
Well Done 170°F
7 to 9 lbs. Roast 325°F 15 to 20 min./lb.
20 to 25 min./lb.
25 to 30 min./lb.
Medium Rare 145°F
Medium 160°F
Well Done 170°F
Lamb Leg, Boneless, Rolled 4 to 7 lbs. Roast 325°F 25 to 30 min./lb.
30 to 35 min./lb.
35 to 40 min./lb.
Medium Rare 145°F
Medium 160°F
Well Done 170°F
Shoulder Roast or Shank Leg Half 3 to 4 lbs. Roast 325°F 30 to 35 min./lb.
40 to 45 min./lb.
45 to 50 min./lb.
Medium Rare 145°F
Medium 160°F
Well Done 170°F
Cubes, for Kabobs 1 to 1.5" Broil/Grill 8 to 12 miunutes Medium 160°F
Ground Lamb Patties 2" thick Broil/Grill 7 to 11 minutes
15 to 19 minutes
Medium Rare 145°F
Chops, Rib, or Loin 1 to 1.5" thick Broil/Grill 7 to 11 minutes
15 to 19 minutes
Medium Rare 145°F
Leg Steaks .75" thick Broil/Grill 4" from heat 14 to 18 minutes Medium Rare 145°F
Medium 160°F
Stew Meat, pieces 1 to 1.5" Cover with liquid; simmer 1.5 to 2 hours Medium 160°F
Shanks .75 to 1 lb. Cover with liquid; simmer 1.5 to 2 hours Medium 160°F

* http://www.fsis.usda.gov/Fact_Sheets/Lamb_from_Farm_to_Table/index.asp