Hands down the easiest way to cook lamb leg, this Slow Cooker Roast Lamb Leg is fall apart tender and incredibly succulent. 2 minutes prep, pop it in the slow cooker, brown it briefly in the oven while you make a killer gravy using the lamb juices. A roast made for sharing with family and friends!
After more lamb leg ideas? Browse all my roast lamb recipes!
Slow Cooker Roast Lamb Leg
In my world, there are only 2 ways to cook a leg of lamb: either perfectly cooked so it’s pink and juicy inside (see my classic Roast Lamb with Gravy), or long and slow so it’s fall apart tender.
There is no in between!
Well, there is. But it’s dry and no amount of gravy can salvage it. It’s also very sad. 😂
Fall-apart-tender slow cooked lamb leg can either be done in the oven or in the slow cooker. Click here for the slow roasted oven recipe, this is the slow cooker version!
I know it sounds counter-intuitive to use the words “roast lamb” and “slow cooker” in the same sentence. But actually, it’s the right description for this recipe because it is cooked in the slow cooker and finished off in the oven to get that beautiful browning. And also to reheat it, in case the slow cooker finished and it was sitting on the warm function for a while.
My slow cooker is a standard size round one and I was able to fit in a 1.9kg / 3.8lb lamb leg purchased from the grocery store (Woolworths in Australia) because the shaft of the leg comes cut so it can be bent to fit into the slow cooker. Vereeee practical!
I’ve used a small full lamb leg here, but it can easily be made with half lamb legs which don’t have the shaft so they will easily fit inside a standard slow cooker.
And of course, if you have one of those oval shaped slow cookers, you could make this with a full size lamb leg! After all, arguably one of the best things about roast lamb are the leftovers. Sandwiches with lamb and gravy. SO GOOD!!!
Gravy for Roast Lamb
And while it’s browning in the oven, we make a quick gravy using the juices in the slow cooker.
No need to deal with the clunkiness of making the gravy in a roasting pan, like you do when you roast lamb in the oven. Nope, this is a super simple one made in a saucepan using butter instead of the drippings in the roasting pan. And of course the juices left in the slow cooker.
All. That. FLAVOUR!
This is the sort of food made for sharing with family and friends. I know there’s something grand about placing a whole lamb leg on the table as a centrepiece. But a pile of incredibly juicy, tender lamb is just as impressive in my books – and there’s no need to pass the plates over and wait for it to be carved. Just dive right in! – Nagi xx
More Roast Lamb Recipes
I love a good roast lamb – so I’ve shared a few over the years!
Slow Cooker Roast Lamb Leg
Watch how to make it
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Slow Cooker Roast Lamb Leg with Gravy
Ingredients
- 2.0 kg / 4 lb lamb leg, bone in (Note 1)
- 1 tsp salt
- black pepper
- 2 large garlic cloves , minced
- 1 1/2 tsp dried thyme OR rosemary (or 2.5 tsp finely chopped fresh)
- 1 tbsp olive oil
- 2 cups / 500ml beef stock (or chicken) (Note 2)
- 1 sprig rosemary , optional
Gravy:
- 50 g / 3 tbsp butter
- 3 tbsp / 40 g flour (any white)
- 2 cups / 500 ml braising liquid from slow cooker , strained
- Salt and pepper
Instructions
- Place lamb in slow cooker or on work surface. Sprinkle with salt, pepper, thyme or rosemary and garlic. Drizzle over oil, then rub on both sides.
- Pour beef stock into slow cooker, add sprig of rosemary (if using).
- SLOW COOK on low for 10 hours, or pressure cook on high for 1 hour 40 minutes. (See oven version here)
- The lamb should be tender enough to pull off with tongs, but still holding together (just!). Carefully remove lamb from slow cooker and transfer to tray.
- Drizzle lightly with oil (any). Bake at 200C/390F for 20 minutes or until browned. Remove and rest for 10 minutes before serving with gravy.
Gravy:
- Strain liquid in slow cooker into a bowl – you will have more than the 2 cups of broth you added, I usually have over 3 cups. Measure out 2 cups of liquid, reserve remaining liquid just in case.
- Melt butter in a saucepan over medium heat. Add flour and cook for 1 minute.
- Add a bit of liquid, mixing as you go so it dissolves. Then add remaining liquid. Whisk if there are lumps.
- Increase to medium high heat and cook, stirring regularly, until thickened to your taste. Use remaining liquid to thin if required.
Recipe Notes:
Nutrition Information:
Life of Dozer
Contemplating being a stowaway.
I don’t want to come across as a snob, but seriously Dozer, if you’re going to stowaway on a boat, you can do better than that!!!
First time cooking in the slow cooker, loved the end result. Did a shoulder, not leg as it is less lamb flavour to me.11 hrs as had a potato bake in the oven prior to putting the lamb in.
That’s great to hear Louis!!
Just made this for my family. I used the boneless leg of lamb from Costco and it was done in 6hrs (a little less than 4lbs). Combined it with roasted broccoli, butternut squash and brussel sprouts. Made the gravy with light butter and whole wheat flour and it was delish! My husband had two servings 😊
Fantastic recipe! We made this for Easter dinner in the Instant Pot and it turned out perfect. I was a bit skeptical that it wouldn’t brown nicely after the IP. I was wrong it tasted like it had been roasted to perfection…very moist. We will be using this recipe again and again. Thanks Nagi!
That’s great Steve!
This is my favorite way to cook lamb… the crispy bits are sooooo good! I always sneak a few pieces in my mouth before serving everyone else!
Chefs treats, an absolute must!! ☺️
I cooked the slow cooker leg of lamb. It was fantastic.
That’s great Jamie!
All the way from Australia, thankyou so much for this recipe! My partner and I lovedddd it! so tender. Your recipes are slowly becoming staples!
Wahoo, what a great compliment, thanks Jayne!
Made this for Passover Friday night. Worked really well! Slow cooker ran for 10 hours; atvthe end of the ritual part of the Seder we took a 20-minute break for the oven part. Gravy was made from juices of a slow-cooked beef roast; much thicker than broth and tasted great. Looking forward to trying in the solar oven!
I’m so happy you loved it Dave!
Hi thanks for the great recipe.
Quick question, do I remove the lamb from the bone before putting into the oven or do I put it in the over as is out of the slow cooker?
Thanks
Brilliant. Thank you so much for sharing this. I will be cooking this on Monday.
Hi, I want to make this for tonight but I don’t have 10 hours to cook the lamb on low. I only have about 6 hours and a 4 lbs leg. Is there a combination of high/low cooking in the slow cooker that can work in this short amount of time?
Hi Yael, try this one: https://innovate-pulse.news/slow-roast-leg-of-lamb/%3C/a%3E – N x
I made this twice in one week! That’s how good it is!
I used 1.4kg half leg and cooked for 6 hours on low, then 20 minutes in oven. I dunno if its me or the slow cooker but but I found it a bit dry. Lucky I made the gravy which helped…I added some homemade mint sauce to gravey for acidity balance. Try as I might I not a fan of slow cooker…yet. The super crunchy potatoes saved the meal IMHO
Just made this. Think the recipe needs to state to leave some stock for gravy ingredients (only mentions to pour over lamb during slow cooking). I added red wine and some sage and garlic to the gravy reduction, served over polenta with roasted veggies. EXCELLENT!
Can I use some white wine and stock to make the cooking sauce? Similar to the oven roasted recipe? I find white wine cooks down deliciously usually, so hopefully it would work here?
Also, would an 8 hour low cook work?
Hi Lissie, yes wine would work nicely. The length of the cook will depend on how big your piece of lamb is ☺️
Hi, I’m just wondering, if I use a boneless leg of lamb, do I remove the netting first? It’s the first time I’m trying to cook it in a slow cooker and I’m not sure if I should remove the netting.
Hi Evy, yes remove the netting – I hope you love it!
Hi Nagi this sounds lovely, Was hoping to make this a day early and reheat in slow cooker – was wondering if that should work?
Hi Jessie, that should work, or you could even microwave covered to reheat ☺️
Hi Nagi this looks delicious, I am planning on making this for Australia Day but was wondering if I can make day before and warm up in slow cooker?
Hello from Canada. First time making a leg of lamb this past weekend and used your slow cooker recipe as written. It turned out fabulous and the savages .., er I mean family, fell on it like starving lions and ate it all up. So easy and so good.
😂 Awesome news!!
I tried the recipe and it was very easy. How long would you suggest cooking a boneless leg of lamb using this recipe?
Merry Christmas Nagi,
We just had your slow cooker leg of lamb….wow absolutely delicious, the gravy was amazing… definitely doing that again next Crimble 😜.
Have a good one.
Phil.
Trying this recipe out tomorrow looks great! Wondering if lamb leg can be substituted with lamb shoulder?