Roasted Leg of Lamb
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This recipe is so good yet it doesn’t require too much time, effort or ingredients. It’s easy & fool-proof, even for you first-timers!
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If you haven’t cooked a leg of lamb before, don’t be intimidated. I know it seems incredibly daunting but it’s so much easier than you think. This roasted leg of lamb recipe here is fool-proof and fuss-free, I promise. And you don’t even need a long drawn-out ingredient list.
Nope, the ingredient list is super simple here.
Ingredients
Leg of lamb
Bone-in will have extra flavor.
Garlic
Adds a lovely buttery flavor profile.
Olive oil
This will serve as the rub for your lamb. We recommend using good quality olive oil here such as California Olive Ranch (our favorite).
Fresh herbs
Chopped fresh rosemary and thyme are common pairings with leg of lamb but you can also improvise with some of your favorite herbs.
Dijon
Adds a sharp, tangy flavor to your lamb rub, balancing out the rich taste of the lamb meat.
Salt and pepper
Season generously! 1/2 – 1 teaspoon kosher salt is recommended per pound of lamb.
Now I left the shank on for it’s dramatic presentation but you can easily purchase one with the shank removed – there’s no advantage here except for the aesthetic eye for serving.
Marinating is also not needed here – you’ll see that the simple garlic mixture rub will bring in so much flavor. And it’s sure to be a crowd-pleaser for your Easter holiday or next dinner party, impressing all your guests with such minimal effort. It also pairs perfectly with these mini hasselback potatoes!
tips and tricks for success
- Go to a reputable butcher. Cooking such a large cut of meat can be daunting! We recommend purchasing a leg of lamb that is preferably grass-fed and organic. Ask for market weight, avoiding baby lamb or mutton. The butcher can also trim the excess fat.
- Bone-in is ideal. Bone-in will have extra flavor, but if you are nervous about carving and serving, boneless can be used.
- Fresh herbs are best. Although you can certainly substitute dried herbs, fresh herbs are key here, delivering the best kind of flavor.
- Use an instant-read thermometer for the most accurate results. Check your lamb halfway through cooking, inserting through the thickest part of the meat but avoiding the bone. The internal temperature should reach 135°F for medium.
- Let your meat rest. As with any large cuts of meat, let your lamb rest for at least 15 minutes prior to serving, allowing the juices to redistribute – this will allow for maximum flavor and juiciness.
what to serve with leg of lamb
Roasted Leg of Lamb: Frequently Asked Questions
Bone-in will have more flavor, but boneless will be much easier to carve. If purchasing boneless, we recommend purchasing oven-safe kitchen twine as the lamb will need to be tied together.
Because a leg of lamb is so naturally tender, marinating is not necessary.
Absolutely! But because dried herbs are often more potent/concentrated than fresh herbs, you need less when using dry. The correct ratio is 1 tablespoon fresh herbs to 1 teaspoon dried herbs.
This really depends on personal preference. We recommend medium (135°F, 20 minutes per pound) but you can also cook to rare (125°F, 15 minutes per pound), medium well (145°F, 25 minutes per pound) or well done (155°F, 30 minutes per pound).
Yes! Leftover lamb can be stored in an airtight container for 1-2 days in the fridge, and frozen in slices wrapped in aluminum foil, reheating at 350°F (still wrapped) until warmed through.
Here is a foolproof step-by-step video guide for a stress-free leg of lamb!
Roasted Leg of Lamb
Ingredients
- 1 (5 pound) bone-in leg of lamb, trimmed
- 4 cloves garlic, minced
- 1 tablespoon olive oil
- 1 tablespoon chopped fresh rosemary
- 1 tablespoon chopped fresh thyme leaves
- 1 tablespoon Dijon mustard
- 1 tablespoon kosher salt
- 2 teaspoons ground black pepper
Instructions
- Preheat oven to 350 degrees F. Line a shallow roasting pan with aluminum foil.
- Using paper towels, pat lamb dry. Using a sharp knife, score the top side of the lamb by making shallow cuts in a diamond pattern.
- In a small bowl, combine garlic, olive oil, rosemary, thyme, Dijon, salt and pepper.
- Place lamb, fat side up, on a rack in the prepared roasting pan. Spread garlic mixture evenly over the lamb, rubbing in thoroughly into the scored cuts.
- Place into oven and roast until it reaches an internal temperature of 135 degrees F for medium, about 1 hour 30 minutes to 1 hour 45 minutes, or until desired doneness. Let rest 15 minutes before slicing.
- Serve immediately with mini hasselback potatoes.
Video
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We made this for the first time. Ran out of thyme and used oregano instead. Great taste and timing was pretty spot on. We’ll definitely use this recipe again.
Just finished having this recipe for our last supper of the year. It was al dente. Couldn’t be better. The bake time, the ingredients, all was just perfect. Thank you for this recipe.
I made this for my wife for New Years Eve (Tonight) to do something special for her, and it was FANTASTIC!!! I got the lamb for a fantastic price too at the grocery store. I got to spoil her and it was awesome! Pairs great with a red wine, some green beans and corn kernels. I seasoned the former with fennel seeds, salt, and pepper, and the latter with truffle salt. I put butter in both and everything was great! I’m so happy she liked it and I did too.
Hi Gino! I’m sorry to ask this but what did you add the fennel seed and ruffle salt to?
Excellent recipe. I also added fresh sage and everyone loved the lamb. I will definitely make this dish again!
Made the recipe twice now in the last 2 weeks. Once last weekend for my immediate family’s dinner with the hasselback potatoes you recommended and once again today for my 93 year old mom and her 94 year old sister who were requesting leg of lamb for Christmas dinner. I brought it to them and dropped it off since they are still on lockdown due to COVID. Everyone that I have made it for has loved it. The ones that surprised me the most were my kids (20 and 22 year olds) – they went crazy for it. And, although I have never been a fan of leg of lamb myself, I thought it was delicious.
Hello! I’d like to make this w the hasselback potatoes tonight. I only have one oven and they cook at different temps… did you just adjust the potato timing to cook longer with the lamb?
Thank you, and happy new year!
Sherri
I have the same question
The potatoes wont crisp up at all while they’re sharing the oven with meat (too much moisture). You could cook them together when the lamb only has a wee while to go then once youve take the lamb out, crank the oven up really hot for 15-20 mins to crispen the potatoes.
I have been cooking lamb in many forms for decades but I usually try to avoid the Leg of Lamb. I end up with it dried out or underdone. This recipe has changed my holiday cooking from now on! Simple ingredients. Easy-simple to follow directions. Fabulous results. I would change nothing. I have 4 legs in my freezer and now I don’t have to butcher them out for other things. I’m hoping to convert my in-law side of the family to eating lamb with this recipe. Thank you!
Outstanding recipe – lamb was tender and delicious. I would use less salt though.
Very good recipe
This was delicious. I thought I had bone in, wrong! I cooked it for 1 hr 30 min. Temp was at 119…added 10 minutes, temp jumped to 150. Still very good. I did not have rosemary, so left it out…added another clove of garlic, thinly sliced and inserted into the lamb because…well…garlic! Need I say more….
Still very very delicious….
My first time roasting it and used your recipe. Came out perfect!
Thank you!
So delish and easy!
Hi Chungah,
Fantastic!!!!
Greatest lamb roast ever.
Love your web site.
MD
So easy and taste good
Never cooked lamb before and this turned out perfect (SO EASYYY) so moist and flavourful thank you so much!!!
Omg delicious never cooked lamb before x
I’m looking to cook a 3.92lb bone in leg of lamb. I’ve never cooked this cut before so I’m wondering how long I will need to cook this for at the recommended temp. Thanks in advance!
Damn Tasty!!! I have a second leg of lamb in the fridge and will be using THIS recipe again!! My new go-to seasoning for leg of lamb!! Do not be afraid of using Dijon mustard!! You will not taste ANY mustard unless of course, you add more on the side .
This was easy and absolutely delicious!! Followed instructions exactly.
Thank you Chungah,,,,I love lamb…Its the most overlooked entree ,.Its cold here so in doing one in the oven,,I usually do it outside cooked on maple wood and charcoal,,The house smells wonderful,,,I really cant believe people coke lamb with all of those spices ,,,Im a salt and pepper guy,,,But I did sprinkle some greek cavenders on it,,,now let it cook a drink some beer and watch football!!!I like this sight,,,,This is my first time here,,Happy thanksgiving to all,,,,Luke
I be making it tomorrow night for Dinner. Yes never made it before and litte scared. Hope it turns out.
Hope it went well! I am going to cook it for dinner tomorrow! Fingers crossed
This was a fabulous recipe. So flavorful and tender and the juices were sublime. I have made twice and will make it again and again!