Leg of Lamb with Obsession Sauce

Submitted by Paulene Christie

Leg of Lamb with Obsession Sauce

4.67 from 9 votes
Serving: 6
Prep Time 5 minutes
Cook Time 7 hours
Total Time 7 hours 5 minutes

Ingredients
 

  • -1.5kg lamb roast
  • - 1 can Campbell's condensed cream of mushroom soup (no water added)
  • -1 pkt dry french onion soup mix
  • 1 onion chopped
  • - 2 tbsp worcestireshire sauce
  • 2 tbsp mint sauce

Instructions
 

  • Place roast and onions in slow cooker bowl
  • Combine all other ingredients and pour over
  • Cook on high for 2hrs then low for 4-6hrs
  • This is the Lamb Obsession recipe just done using a roast ?
Paulene @ Slow Cooker Central

About the Author: Paulene @ Slow Cooker Central

85 Comments

  1. Did this with a rolled Lamb Shoulder Roast and smashed it out of the park. Will get a bigger cut next time and double up.

    Paulene, you’re a genius!

  2. Ngaire stewart May 17, 2016

    Am about to find some lamb roasts in freezer and thaw out for cooking tomorrow!! I must check that I have Mushroom soup, Im going to add some fresh mushrooms too just because I love them.

  3. Sheri Aliotta June 6, 2016

    Tried this tonight…absolutely scrumptious! A definite winner in this household! Thankyou to the creative person who came up with the recipe!

  4. Chantel Abraham July 30, 2016

    Amazing! What a simple yet tasty meal, I’m in love with this recipe ?

  5. Neil Sheppard August 11, 2016

    I really want to try this but EVERY time I cook lamb for my family they say “It’s too fatty” or “It’s too greasy” Does this turn out fatty / greasy?

  6. Bronwyn Mills August 27, 2016

    Omg this is amazing!!! The lamb was so tender and the sauce was absolutely delicious. This will be a regular in my house I am making it again next week

  7. This is absolutely delicious and is now a regular in our house hold. Just need to get my portion sizes under control as it is hard to stop

  8. This is a favorite in our house although my 6 year old calls it fireman lamb. No idea why but happy for him to call it whatever he wants if it ends in a clean plate (which it always does)

  9. Family loved it, used spring vegetable soup mix instead, definitely cooking again.

  10. First time obsessor here! How will I know if my lamb will need 4, 5 or 6 hrs on low ? I’d like the meat to melt in my mouth and be easy to cut. Thanks. 🙂

    1. Paulene @ Slow Cooker Central February 15, 2017

      Give it at least 4hrs on low (after the 2hrs high) if its’ a smaller roast like around 1kg or go the 6hrs if it’s closer to 2kg or above 🙂

  11. Emma Jones March 13, 2017

    OMG Family loved it. My 7yr old son even commented “the meat is so nice and soft, it melts in your mouth”.

  12. Elaine Smith March 28, 2017

    I made this with roast veg and some steamed veg for visitors and they raved about it. Really delicious the flavours were just beautiful together.

    1. Paulene @ Slow Cooker Central April 14, 2017

      Yes
      Any roast size piece of lamb of any kind will work 🙂

  13. Trying this for the first time, just wondering if I need the teatowel under the lid please?

  14. Ok so I have just put this in on, my first time making it (I’m not lover of lamb) but the people I’m making this for are. I’m using a lamb shoulder roast.
    My question: will this fall f the bone & do I just use forks to seperate it ( like I do for the pulled pork?
    Please & thank you

    1. Paulene @ Slow Cooker Central June 11, 2017

      Sorry I missed your question until now
      I find it easily shreds the same was as you’d do pulled pork if cooked long enough
      Or you can slice it like a roast style 🙂

  15. Made this up with a leg of lamb before we went out to the footy today and 8 hours later when we arrived home it was ready. The meat fell apart and was SO succulent. Thankyou for a super easy and delish meal x

  16. I made this with a lamb shoulder. It was amazing! My favourite slow cooker meal so far. The meat easily shredded, plenty of sauce, so easy to do.
    I ate it with fresh bread.

  17. Kellie Clark February 13, 2018

    Tried this for the first time tonight and was so happy with the result! This is absolutely beautiful, so yummy and devoured by my family! It’s so easy too which is an added bonus! This will become a regular for us! ?

  18. Did this with chops last night. Husband said I can cook it every night only there was one problem. NO Leftovers bloody beautiful. Will certainly be having this again. Might try small lamb roast next time.

  19. Michelle Coley March 4, 2018

    Can I just cook on low for longer as I won’t be home to change the settings?
    Thanks

    1. Paulene @ Slow Cooker Central March 5, 2018

      Yes it will cook happily for 6-8hrs on low easily 🙂

  20. Janet Miller March 13, 2018

    We had this for dinner tonight. BEAUTIFUL!!!! Everyone enjoyed it. Will definitely be having this again. ??

  21. I’m going to try lamb roast do I have to cook on high for 2 hours first or can I cook for 8 hours on low as I work

    1. Paulene @ Slow Cooker Central May 14, 2018

      You can do it all on low for sure 🙂 If it’s a large roast it can easily handle more hours 8-10hrs on low

  22. Love the sound of this but hubby won’t touch mushrooms. Any suggestions for replacement soup flavours? Thinking tomato perhaps?

    1. Paulene @ Slow Cooker Central May 22, 2018

      Steph if you go to the original recipe and have a look at the comments below it you’ll see dozens of people all leaving feedback that there is zero mushroom taste and they feed it all the time to unsuspecting mushroom haters who never once detect it … trust us… he won’t taste it 🙂

  23. OMGEEE!!This was the most amazing Leg of lamb I have ever had..cooked a 2kilo leg using the “lamb Obsession”recipe..how something so easy an quick to prepare with minimal ingrediants can taste that good is just AMAZING!!!
    LOVED this..LOVED everything about this.
    10 out of 10???

  24. Love it. ????
    I use roast lamb, trimming most of the fat off. Remove any bones and shred meat , and mix through the sauce, serve with mashed potato and veggies. Yummy. ?

    Oh and if any left overs, it makes amazing toasties/jaffles.

  25. Deborah Hayes August 25, 2018

    HUGE FAMILY FAVE!! Meat literally falls apart. The leftovers (if any!) are the most devine pie filling for the next nights dinner.

  26. Susan McKinlay September 19, 2018

    It’s not often I rave about a recipe but this one deserves all of the 5***** reviews it has been given. I used a lean leg of lamb and it fell off the bone it was so tender. The Obsession Sauce is to die for. I carved the meat and put it back in the sauce for the last 30 minutes and served it with new potatoes, runner beans and carrots. Abolutely gorgeous!

  27. So I’ve made this several times and thought I’d better leave a review. WOW! What a super easy yet super tasty dish..we love it! Made with both a roast and chops. Make the juice into a gravy. Mmm. Husband calls it Lamb Delicious! Even got my mum onto it!

  28. I made this for the family for the 1st time it was so delicious the meat was super tender and just fell off the bone. So easy to prepare I did leave the mint sauce out though as we don’t like it .
    Definitely a winner for our house

  29. Cooked this today with rump and it was amazing. Didn’t add the mint sauce because I didn’t have any. I have prepared this as a dump bag and just added veggies and it was amazing. Definitely lived up to the all the reviews and will be doing this again

  30. Debbie Millar April 27, 2020

    Had Lamb obsession with leg of lamb omg was just awesome lovely flavours wont do any other way yummy

  31. Jade Whitham May 17, 2020

    This has been a big winner in this house for years now 🙂 my children and I absolutely love it as well as other family and friends it’s amazing 🙂 I wish lamb was cheaper to have more often haha we usually cook roast veggies to go with it and we even had it for Christmas one time and was a massive hit

  32. This is awesome. Added some garlic to the mix tho. It will be a regular at our house

  33. Terri Joyce June 2, 2020

    First time cooking this and it was beautiful, will be cooking it again for sure.

  34. Alison Armstrong June 17, 2020

    Love this recipe, so tasty, works so well with a leg of lamb. I’ll never cook a leg of lamb any other way! Big hit with the family. Leftovers great on toast or sandwiches the next day.

  35. Patricia Sauer July 9, 2020

    I must be the only person that doesn’t like this recipe. Meat was lovely but I did not like the sauce. Think it may have been the french onion soup. ?

  36. Tried for first time today and sauce was absolutely delicious, I didn’t make any amendments.
    My lamb leg was a bit fatty so would use different cut next time.
    Will definitely make again.

    1. Paulene @ Slow Cooker Central November 26, 2020

      If you are worried it will taste like mushrooms – don’t worry 🙂 Every day I see adamant mushroom HATERS assure me they never tasted it and even feed it to unsuspecting mushroom hating partners and they never guess hahaha
      If it’s allergy related you can swap to cream of chicken but it’s not as good

  37. Sharon Edwards April 28, 2021

    I made this for my family. We only had a small roast so I added some more chops. Omg will be definitely cooking it again.

  38. Could you do this with chicken and use condensed chicken soup?

    1. Paulene @ Slow Cooker Central May 10, 2021

      Yes we often do Chicken obsession. I still use the mushroom soup myself and it’s amazing but you can use chicken if you want 🙂

  39. wow, this was amazing. didn’t change anything, did as recipe states. the sauce poured over my mash and veg, beautiful

  40. I tried this same recipe with 6 lamb forequarter chops it was absolutely delicious!

    I also doubled the amount of liquid (not the mint sauce I left that the same) so there was lots of gravy to go over the mash and vegies I was serving with it.
    No complaints and got told I can make it anytime ? it’s definitely a winner here ?

  41. I have an all in one cooker that only does “high” on the slow cooking function. I usually do lamb for around 4 hours high with great success. Any idea if I can cook this obsession dish on just on high or will the sauce be bad?

    1. Paulene @ Slow Cooker Central May 10, 2022

      I’m assuming that’s a mulitcooker and not an actual slow cooker?
      Sadly these are the many downfalls of these machines.
      This should be ok on high but I’d expect a leg will need longer than 4hrs usually. However again, because it’s not a slow cooker I’m not certain on those times 🙂

  42. I’ve done this recipe with shanks before but I think the Leg of Lamb is my favourite <3 doesn't taste like mushrooms as my husband and I can't stand them but we love the Gravy you get using this recipe. The leg of lamb fell apart so good served with roast spuds…

  43. Made this a couple of days ago, for the first time, and it was a winner. Took the bones out before serving. The meat fell apart and the sauce was delish. I dislike mushrooms with a passion, but could not taste any mushroom flavour in this recipe. I added minced garlic to this as well, just because I pretty much throw garlic into most of my cooking. You can taste the mint though, so if you don’t like mint with your lamb, you could halve the amount and it would still taste awesome. Will be definitely making this dish again.

  44. I made this last night and OMG ?? will definitely make it again , my daughter Hates mushrooms and will throw tantrums over them , but reckons was the best gravy she has ever had so definitely a winner for me ,( I didn’t have the heart to tell her it has mushrooms as I would love to eat it again )

  45. Absolutely love this recipe. Even hubby who is meat and 3, no just 2, veggies man loves it. I use Lamb Forequarter Cutlets/Chops which I usually buy on special and keep in the freezer until ready to use. All the ingredients go so well together and if you don’t like mint, mushrooms or Worcestershire Sauce it doesn’t matter as none of these flavours are dominant and I would be hard pressed to detect the flavours. Such a great recipe, thanks Paulene.

  46. 5 stars
    Loved this recipe! So easy and super tasty. Even my fussy child wanted seconds, seriously! Will add this recipe to the regular week night dinners ?

  47. 5 stars
    I finally got around to making this and NOW understand what the “obsession” is!
    Lamb was “fall off bone” tender and the sauce was so flavoursome.
    I would suggest using the reduced salt French onion soup mix though, as it was a tad salty for my taste.
    Easy as to get an awesome meal – which is lick the plate, no leftovers!

  48. Kerry Brown July 14, 2024

    5 stars
    I’m obsessed with the sauce, kept tasting all arvo !
    Lamb was very succulent and such a mess free way to do Sunday roast.

  49. Hi Paulene,
    thank you soooo much for all your great recipes, I’m making leg of lamb with obsession sauce , I have a 1.7kilo leg and cooking on low for 9 hours does that sound right ? Also with the sauce do you thicken at the end , does it need straining first ? sorry for so many questions.
    kind regards
    Sharon

    1. Paulene @ Slow Cooker Central September 15, 2024

      Hi Sharon 🙂

      That time sounds great 🙂
      You can thicken it with these options HERE
      Or if you shred the meat and return it to the sauce that thickens it also without adding anything extra
      I don’t straight it but I do scoop off the fat from the top before stirring it since lamb has so much natural oil 🙂 More on those options HERE too

  50. 5 stars
    I have made this a few times with forequarter chops and the flavour is fantastic. But the chop bones can be a bit of a (sharp) nuisence. Today I bought a leg of lamb to do it with because crazily, at $10 a kilo, a leg is cheaper than fourquarter chops!
    I think tomorrow, as we are promised a little respite from our 40° days.

    1. Paulene @ Slow Cooker Central January 25, 2025

      That’s great! Thanks for taking the time to leave feedback Sheila 🙂

  51. Carly Visscher February 19, 2025

    Second time making this & whole family loved it – again! I’m keeping the mushroom soup a secret for now… the fussiest of eaters that won’t go near mushrooms hasn’t realised it’s in the sauce 🤣

    1. Paulene @ Slow Cooker Central February 20, 2025

      No one EVER picks it Carly – it’s our little secret 😉 😉

  52. trying this today with a leg, would it work with veg added in so it’s a bit more “stew” like once pulled? I have potato carrots and zucchini that need used, I figured they would be OK for mopping up flavour.? I often grate zucchini in as a thickener and to sneak an extra veg into the kid haha

    1. Paulene @ Slow Cooker Central March 19, 2025

      You can certainly add them (bearing in mind the oily nature of lamb of course) but I do see others add veg like potatoes and carrot 🙂 Keep the potatoes cut chunky small so they get tender enough in the cooking time as potato can be so touchy with such things 🙂 I’d add the zucchini towards the end though. Let us know how it goes and what you think of it please K 🙂

  53. 2 stars
    Have been wanting to try this recipe as I read the reviews and it sounded so good. Unfortunately, even though I followed the recipe exactly, and the meat was tender, although a bit on the dry side, we did not enjoy the sauce at all. Extremely disappointed.

  54. 5 stars
    I looked at the ingredients time and time again. And read the reviews. And I was confused.
    Today I gave husband the instructions and had everything out and ready to go. (We used Lancashire relish instead of Worcestershire, because that’s how we roll)
    I am amazed. It really doesn’t taste like mushroom. (We love mushroom)
    Funnily enough my first reaction was it tastes like apricot lamb, but not.
    I think it’s the French onion soup and the mint jelly that gave it that fruity (not too) sweet kick.
    Miss 4 and miss 2 had a huge bowl each with mash and broccolini and ate the lot.
    Husband and I are just about to have dinner (after a taste test or 6) and we can’t wait.
    Amazing.

    1. Paulene @ Slow Cooker Central April 13, 2026

      I love when feedback takes me on a journey like this Jen! 🙂

4.67 from 9 votes (2 ratings without comment)

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