Slow Cooked ‘Roast’ Lamb

Submitted by Paulene Christie

Slow Cooked ‘Roast’ Lamb

4.85 from 20 votes
Serving: 6
Prep Time 5 minutes
Cook Time 8 hours
Total Time 8 hours 5 minutes

Ingredients
 

  • 1 - 2kg piece of lamb roast
  • 2-3 cloves fresh garlic
  • Sprigs of fresh Rosemary
  • 2 tsp beef stock powder
  • 1/2 cup hot water
  • 1-2 tbsp mint sauce (or a few leaves of fresh mint if you prefer)

Instructions
 

  • Make several small slits about 1-2cm deep into the lamb and insert a half a garlic clove and some rosemary sprigs in each hole
  • Place lamb in slow cooker bowl
  • Mix stock powder with water, combine mint sauce with this liquid and pour into base of slow cooker bowl
  • Cook on low for 6-8hrs depending on your machine
  • I spooned the juices from the bowl over my lamb several times over the course of the day to achieve this color but that's optional.
  • Remove garlic/rosemary from meat prior to carving
  • Beautiful served with roast vegetables and gravy made on the pan juices
  • You may also chose to place your roast vegetables under the lamb when you put this dish on if you prefer 🙂
Paulene @ Slow Cooker Central

About the Author: Paulene @ Slow Cooker Central

59 Comments

  1. This is a great recipe. I browned mine in the oven on high after cooking, for the traditional “roasted” look.

  2. Rebecca Drake March 24, 2016

    This was absolutely beautiful, I did change a few things and added mint jelly in place of the liquid mint sauce. Also added a quartered onion and 5 garlic knobs to the base.

  3. Ellen Polomka July 23, 2016

    We absolutely loved the lamb done this way. Will always do it this way. BEAUTIFUL ABSOLUTELY BEAUTIFUL

  4. Ellen Polomka July 23, 2016

    Loved it. It was absolutely fabulous. Best way of doing. From now on hubby says in sc.

  5. Loved it pauline 2.5kg for 6 hours on slow didnot have any mince sauce.With juices l made gravy.

  6. Best ever roast lamb no mince sauce.I made gravy with the juices thxs again

  7. 100% Foolproof and absolutely beautiful. Loved by whole family, including 3yo. Too easy…soo nice! 2.5kg leg was no problem.

    This is also, totally a, “newbie-friendly” recipe, so give it a go!

  8. I used a 2kg shoulder rather than a leg and it turned out AMAZING! I have a very happy husband and inlaws all with full bellies. The gravy was spectacular too. There is just enough leftover meat and gravy for a roast lamb roll for hubby’s lunch tomorrow. Can’t rate this highly enough!

  9. Daphne Davis February 18, 2018

    This was realy nice will make again, I used a oxo cub & browned in the electric frypan for a few minutes

  10. Marlene Zvaigzne May 30, 2018

    We absolutely love this roast. I don’t even consider doing it any other way now. Thanks heaps.

  11. Joanne Talarico April 21, 2019

    Omg , thanks so much for this recipe. So easy but oh so yummy and that gravy absolutely Devine.

  12. Kylie Walker April 27, 2019

    MUST TRY! Absolutely delicious, I added 1/2 cup of red wine, cooked on high for for 3 hours and popped in oven for 10 minutes after.

  13. I made this last night and it was a great success & well received by my family . Thanks for the recipe!

  14. Beverley Dias McAllum June 7, 2020

    What difference would it make if the vegetables were put under/over the lamb? Thanks

    1. Paulene @ Slow Cooker Central June 8, 2020

      It won’t change the cooking time 🙂 Just be aware that by the end of cooking time they will be sitting in/under the cooking liquids that it will produce.
      So they’ll be lovely and tender and full of flavour but won’t be crisp etc. Some like to crisp up in the oven at the end but I don’t bother doing so 🙂

  15. Hi I was just wandering could you do this on high? If so how long do you think say for a 2kg leg of lamb… just thinking for christmas lunch 8 hours would make for a very very early rise out of bed

    1. Paulene @ Slow Cooker Central December 22, 2020

      Jodie I would still give one that size at least 6hrs high if not more – it can vary a bit on your cooker 🙂

  16. Lauren Spackman April 18, 2021

    Another amazing recipe, cooked to perfection! We loved the subtle minty taste through the lamb! 1yr old loved it too ??

  17. Lyn Douglass April 20, 2021

    Juicy, tender, flavoursome, smothered with beautiful gravy from pan juices makes for a delicious ‘Roast’ with very little effort. If you haven’t tried it – give it a go – you won’t be sorry.

  18. Tried this last night! It was incredible! Added a little bit more stock to make gravy with and left out the mint sauce (hubby not a fan of mint sauce) and we were practically licking our plates clean!
    Great for when it is too hot to have the oven on!

  19. Kerry Brown March 3, 2022

    Super easy, no greasy mess, no over powering smells just nice aromas through the house.
    First time I cooked I added juices to saucepan gravy. Second cook I added Gravox slurry to SC, this way is the best!
    Amazing roast, absolutely delicious ??

  20. Sharon James March 29, 2022

    Do you place the lamb on a trivet so it is above the liquid or sit it in the liquid?

    1. Paulene @ Slow Cooker Central March 30, 2022

      Sit in the liquid – for juicy full of flavour results 🙂

  21. Tiffany Huston May 7, 2023

    5 stars
    Made this again tonight. Always great. Meat falls off & is so tender & juicy. Definitely my go to recipe for roast lamb in the slow cooker.

  22. Deb Kennedy July 11, 2023

    5 stars
    Loved this recipe! The bone came out clean when I took the meat out of the slow cooker. I used garlic from a jar and dried rosemary as that’s what I had. I also made my own mint sauce from malt vinegar, dried mint and some sugar. Delicious ? Thanks for the recipe.

  23. 5 stars
    Made this for our dinner tonight. the meat is tender and melt in the mouth. I don’t have mint sauce so I left it out but still taste really good. I will try it with mint sauce next time. I had beautiful gravy from the juice. Our little family enjoyed our Sunday roast dinner. Definitely be one of our favourites. Thank you for the recipe.

  24. Ruvae Harrison October 3, 2023

    5 stars
    Wow Made this for tea last night Absolutely amazing. Did not have any garlic clove so used minced garlic.I did put iit un the oven for a few minutes. Will be certainly doing it again. Thans again ????

  25. Amanda Harper October 15, 2023

    5 stars
    O.M.G! First time lamb leg on the bone in the SC. 3kg piece plugged with rosemary, garlic, smothered with minced garlic & mint jelly. Nothing else. No liquid added. It was an inch too long for my SC so I improvised with a foil lid. Turned off after 6 hours on low & let it sit for one hour while i did veges & gravy. We like our lamb pink. This was not pink, however the family vote is it was the best lamb ever; don’t ever cook it any other way. Sprinkled with roast lamb seasoning & under the grill for 10 minutes to get it crispy. Lamb Gravox mixed with juices from SC was the best gravy ever too. Yum.?

  26. 5 stars
    This recipe is delicious. Made as per recipe adding mint jelly instead of mint sauce. Gravy was made with Gravox and juices. Certainly be making this again sooner than later.

  27. Maria Mihailidis January 3, 2024

    5 stars
    Oh my Lord!!!
    This is the best slow cooked roast lamb.
    Will definitely be making it again as hubby asked when am I cooking this again??
    I will increase the mint sauce to double with the stock powder.
    This is a winning roast dinner ???
    Thank you Paulene for sharing your recipe ?????

  28. 5 stars
    I didn’t use any stock/liquid other than a slurp of mint sauce , and at the end I mixed in some maggie rich gravy powder in with the juices . Oh my gosh it was the best lamb we have ever had. Much nicer than cooked in the oven !

  29. 5 stars
    I just added the garlic and Rosemary to the dish and threw in a few mint leaves. At the end I added maggi gravy to it. Yum yum yum, great roast.

  30. 5 stars
    I had a boneless piece of lamb & cut most of the flap of fat off otherwise I find it too greasy. Already had plenty of fresh mint, rosemary and garlic, that’s why I chose this recipe. Put a few potatoes & carrots around. Was really easy & delicious.

  31. 5 stars
    Absolutely beautiful! Very easy preparation for the can’t cook won’t cook cohort (like me)!
    Definitely on our fortnightly meal plan. Even my mother who hates lamb absolutely loved it!

  32. Helen Vardanega February 12, 2025

    5 stars
    My first time cooking a lamb roast in the slow cooker and it was amazing! It was so moist and tender and there was plenty of juices to make a delicious gravy! I left out the mint.

  33. Pat Schuberth July 6, 2025

    This was delicious!!! The meat literally fell off the bone. Won’t bother cooking in the oven again, but did miss the crispy top. T
    it was so moist and the juices made delicious gravy

  34. Kath Catterall September 9, 2025

    5 stars
    wow a huge success,my first lamb roast in the slow cooker,I had a boneless piece not quite 1kg cooked 5hrs basting every now & then,it was moist and tender,great flavours for the gravey! Thanks Pauline!

  35. 5 stars
    This recipe is super easy and absolutely delicious. I no longer enjoy cooking, so perfect for me! I followed the recipe with the exception of the mint sauce. I made gravy on the stove and added some of the juices from the SC to make it taste better. 😋 😋

  36. 5 stars
    So tender and full of flavour — the slow cooker made the lamb fall-apart perfect ✨ Juicy, comforting, and effortlessly delicious. This one’s a keeper! 🍖

  37. 5 stars
    Absolutely delicious. Meat is so tender & flavoursome. Only way I’ll do my ‘roast’ lamb. I salt the lamb at the start but no other changes. Recipe is perfect.

  38. Karen Luttrell April 6, 2026

    5 stars
    So easy and delicious. I had 2 slow cookers going with a leg of lamb in each. Both turned out so tender, falling off the bone tender. I will definitely use this recipe again.

    1. Paulene @ Slow Cooker Central April 7, 2026

      How lovely to read – thank you so much Karen 🙂

  39. Marlene Zvaigzne April 6, 2026

    5 stars
    Cannot cook my Roast Lamb any other way.It is divine. Turns out perfect everytime. Thanks heaps. ❤️

    1. Paulene @ Slow Cooker Central April 7, 2026

      Thanks so much for your lovely feedback Marlene 🙂

4.85 from 20 votes (2 ratings without comment)

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