Lamb Cooking Times

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When cooking lamb, the proper lamb cooking time and the correct cooking temperature are extremely important. The optimum flavor and tenderness of various cuts of lamb can be consistently achieved when care is taken to follow the guidelines for the recommended lamb cooking times and cooking temperatures.

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Using the recommended time and temperature guidelines will ensure that the meat is cooked to the minimum safe internal temperature, which is critical in preventing food-borne illness that can be caused by undercooked food. Using an accurate meat thermometer is the best way to ensure the proper doneness of lamb.

Whether you are looking for a boneless leg of lamb cooking time or a rack of lamb cooking time, use the following chart as a cooking time and temperature guide for lamb cuts that are cooked in the oven, grilled, or are inserted into an oven bag prior to cooking. See the article, "Doneness of Lamb" for additional information on determining the proper doneness of lamb.

LAMB Cooking Times and Temperatures

Lamb Oven Roasted at 325°F

Lamb Cut Weight Approximate Cooking Time (minutes per pound)
Medium-rare (145°F) Medium (160°F) Well Done (170°F)
Whole leg 5-7 lbs. 15-20 minutes 20-25 minutes 25-30 minutes
7-9 lbs. 20-25 minutes 25-30 minutes 30-35 minutes
Leg (shank half) 3-4 lbs. 25-30 minutes 30-40 minutes 35-45 minutes
Leg (sirloin half) 3-4 lbs. 25 minutes 35 minutes 45 minutes
Leg roast (boneless) 4-7 lbs. 20 minutes 25 minutes 30 minutes
Rib roast or rack
(cook at 375°F)
1 1/2 - 2 1/2 lbs. 30 minutes 35 minutes 40 minutes
Crown roast
(unstuffed cook at 375°F)
2-3 lbs. 25 minutes 30 minutes 35 minutes
Shoulder roast 4-6 lbs. 20 minutes 25 minutes 30 minutes
Shoulder roast (boneless) 3 1/2 - 6 lbs. 35 minutes 40 minutes 45 minutes
Note: Start with meat at refrigerated temperature. Remove the meat from the oven when it reaches
5° to 10°F below the desired doneness; the temperature will continue to rise as the meat stands.

Lamb Grilled with High Heat

Lamb Cut Thickness or Weight Approximate Cooking Time (minutes per side)
Medium-rare (145°F) Medium (160°F) Well Done (170°F)
Chops
(shoulder, loin, or rib)
1 inch 5 minutes 8 minutes 10 minutes
Steaks (sirloin or leg) 1 inch 5 minutes
Kabobs 1 inch cubes 4 minutes
Patties 1/2 inch 3 minutes
Leg (butterflied, cooked with indirect heat) 4-7 pounds 40-50 minutes total

Lamb Cooked at 325°F in an Oven Bag

Lamb Cut Total Weight Approximate Cooking Time (total time)
Regular-Size
Oven Bag
10"x 16"
Large-Size
Oven Bag
14"x 20"
Turkey-Size
Oven Bag
19"x 23 1/2"
Leg of lamb (bone-in) 8-10 lbs. 2 - 2 1/2 hours
Leg of lamb (boneless) 7-8 lbs. 1 3/4 - 2 1/4 hours
Leg roast (rolled, boneless) 2-4 lbs. 1 - 1 1/2 hours
4-5 lbs. 1 1/2 - 2 hours
Leg roast (half, bone-in) 3-5 lbs. 1 - 1 1/2 hours
Oven Bag Instructions: Preheat the oven to 325°F. Add 1 tablespoon flour to the oven bag and distribute evenly on the inside of the bag prior to inserting the lamb. Remove the lamb from the oven when the meat thermometer reaches 150°F or when the meat is fork tender. If using a turkey-size oven bag for a lamb cut smaller than 12 lbs., gather the oven bag loosely around the lamb meat allowing room for heat circulation; then close the bag with a nylon tie, and cut away any excess oven bag.

Lamb Cooking Times Reviews

lamb cooking times

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Average of 5.00 out of 5 stars
Rating of 5 out of 5.0 stars
Ratings (2)
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food4me User
Reviewed By
"Going to try cooking a lamb roast for St. Patrick's day. I think I will try using an oven bag this time to see how that works. The cooking times shown here should help me out."
gigs User
Rating of 5 out of 5.0 stars
Reviewed By
"My wife told me if I wanted lamb that I would have to figure out how to cook it. So I bought a leg of lamb and used this chart for cooking times & temps. This page also had some links to information about preparing the lamb that were very helpful."
Savory User
Reviewed By
"We always have leg of lamb on Christmas Eve because that is when we get to celebrate as a family. I have never made it in an oven bag but I am going to try it that way this year. It sounds like it will should be very moist. Can't wait to try it."
MaryPat User
Rating of 5 out of 5.0 stars
Reviewed By
"Nice to find this chart. We always fix leg of lamb for Christmas and I am never too sure how long it needs to cook. I don't find much info on cooking lamb so some of the links on this page were also interesting."
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