Slow Cooked French Onion Lamb Shanks

Submitted by Gail Burge

Slow Cooked French Onion Lamb Shanks

4.63 from 8 votes
Serving: 4
Prep Time 5 minutes
Cook Time 5 hours
Total Time 5 hours 5 minutes
Servings 4

Ingredients
 

  • 4 Lamb Shanks--
  • 1 brown onion
  • 1 cup beef stock
  • 1 PKT French onion soup mix
  • 2 tablespoons tomato sauce
  • 1 tablespoon Worcestershire sauce
  • 2 carrots cubed.

Instructions
 

  • Place all in slow cooker
  • Cook on high for 4-5 hours
  • Leave lid off for last 15 minutes to reduce liquid.
  • Serve with cheese and parsley mashed potato's
  • 4 potatoes boiled and mashed
  • 1 handful tasty cheese
  • 1 tablespoon finely chopped parsley
  • 2 tablespoons thickened cream
  • Mix mix until smooth and creamy.
Paulene @ Slow Cooker Central

About the Author: Paulene @ Slow Cooker Central

69 Comments

  1. Curious, could throwing in other veggies as well as the carrots work too? I’ve got a fussy toddler to feed and veggies always end up on the floor haha.

    1. Paulene @ Slow Cooker Central June 3, 2016

      The oily nature of lamb could make them a little oily but give it a go I say 🙂

  2. Hi just wondering if the 1 cup of beef stock is the only liquid in this recipe? Just doesn’t seem enough liquid to cook properly? Not wanting to stuff it up! 🙂

  3. Hi,I am just wondering whether I could cook these for 8 and a bit hours as I will be at work all day?

    1. Paulene @ Slow Cooker Central August 17, 2016

      I would do so Lesley, lamb shanks are very tolerable to long times cooking, but be sure to cook on LOW not high 🙂

  4. Loved this.
    I used gravy flour to thicken the cooking liquid into a gravy and added an extra slug of wostershire sauce and tomato sauce.
    Easy recipe as I always have these ingredients in the pantry.

  5. This recipe is excellent. The sauce has a lovely flavour and it’s a very affordable family meal.

    Thank you Gail

  6. Robynne Dare July 13, 2017

    We had this for dinner last week and it was very yummy with lots of flavour… So this week my dad asked if you could use Turkey legs. We had it for dinner tonight with Turkey legs and the only ingredient i changed was the Beef stock to Chicken stock and was yummy… I’m not a fan of turkey as i find it too dry but this just fell apart…. Only problem with turkey is that it is also very filling….

  7. This was a real winner!! Followed the recipe except for the carrots and thickened the sauce with 3 tablespoons of instant chicken gravy with 30min to go. Delicious!!

  8. I love this recipe and so did the whole family! So easy to throw together too. I use beef instead of lamb shanks and serve on mashed potato. Thanks for sharing! 🙂

  9. Andrea Bonnar March 16, 2018

    I made this recipe the other day, deeeelish! I used a tsp of powdered beef stock instead of liquid stock , a can of chopped tomatoes, a clove of garlic and two tiny red chillies, it was a hit. And the gravy on mashed potatoes is super yum, thanks for an easy shanks recipe

  10. Leonie Rogers April 4, 2018

    Divine. It was so flavoursome and the meat simply fell off the bones. We are putting this in our favourites to have again.

  11. Karen Lyons April 12, 2018

    I added a teaspoon of chilli flakes and a teaspoon crushed garlic, thickened liquid with a little cornflour..absolutely fantastic

  12. PLEASE why can’t we have recipes with ingredients without using packaged ingredients ( French Onion Soup)

    1. Paulene @ Slow Cooker Central August 17, 2018

      You do Kathy Roberts – doesn’t seem like you are looking I very hard??
      You have about 2500 other recipes to choose from that have NONE
      Go do that instead of being rude on other members recipes 🙂
      Help thyself – it’s not hard after all 🙂

  13. We have these about once a fortnight. Absolutely delicious! Such an easy and tasty recipe. I always keep the leftover gravy and have it with sausages the next night. Can’t wait to try it with beef.

  14. Jennifer Taylor June 17, 2019

    I cooked this dish today but substituted the lamb shanks with 6 chicken drumsticks. I also usd the low salt variety of the onion soup mix. I cooked it on low for 8 hours & thickened the sauce with cornflour. I served it with sweet potato mash & steamed broccoli. A very enjoyable meal.

  15. Can anyone please tell me do I need to mix the onion soup mix with water or anything? Or just add in it dry?
    Thank you

  16. Absolutely scrumshussss! I was ready to put my slow cooker away in the cupboard or give away bcoz i hadn’t made anything that i found absolutley delicious, until this, slow cooker definately staying ??

  17. Fantastic recipe with store cupboard ingredients. I made a slight change in not reducing the sauce towards the end, instead, I removed the shanks (I used homegrown hogget) and added cornflour to make a thicker sauce. Blitzed the cornflour into the remaining liquid. A wonderful autumn touch to the meal.

  18. I love this recipe, at the end I make a slurry of plain flour and water and add it to the juices to thicken and make a gravy. Amazing

    1. Paulene @ Slow Cooker Central May 19, 2020

      No you don’t need to pre brown them Kerrie 🙂

  19. Just finished eating this tonight and everyone cleaned their plate! So easy to make. I followed the recipe to the letter except I took the meat off the bones at the end, added some cornflour to the liquid and then returned the meat to the slow cooker while I served up the mash and green beans. Perfect Sunday dinner on a cold winter’s night

  20. I’ve never been a big fan of lamb shanks, UNTIL NOW! This recipe is amazing and so full of flavour. If I could give it more stars I would.

  21. Jacqui Bull August 7, 2020

    First time making these tonight, they were amazing, the whole family loved them, will definitely make again.

  22. I made this for the first time last night, certainly won’t be the last – delicious ??

  23. I decided to try this one tonight, only change I made was the Onion as my son isn’t a fan of it (33 yrs old, yeh I know hahaha) so I substituted the onion with cherry tomatoes and wasn’t disappointed, very nice if I say so myself… 5 stars for sure

  24. Am going to try tonight!! Did anyone braise the shanks prior or just straight into the pot?

  25. Family enjoyed this great recipe. Easy to make. I tweaked slightly, in that I cooked on low for 8 hours and thickened with a cornflour slurry 20 minutes before serving with kumara mash and green vegetables
    ?

  26. Trish Kelly July 9, 2021

    I cooked this last night
    Seared four lamb shanks,double all sauce ingredients. Four and half hours on high.
    Perfect.

  27. If I’m only cooking 2 do I still do the same cooking time, obviously I’ll half the other ingredients 🙂

  28. Christine Findlay June 7, 2022

    One of my favourite dishes, so easy to make and a family favourite.

  29. Pamela Charles May 27, 2023

    First time doing this recipe and won’t be the last time…it was very scrumdiddlyumptious along with the cheesy/parsley mash…..clean plates all around in our house tonight. Thanks Paulene

    1. Paulene @ Slow Cooker Central May 29, 2023

      This great recipe is Gail’s creation but I’m so pleased you enjoyed it Pamela! 🙂

  30. Maria Mihailidis June 30, 2023

    5 stars
    Loved this recipe.
    Not too much tomato flavour in it, not salty either. The meat fell off the bones, melt in the mouth.
    Another meal on repeat.

  31. 4 stars
    so easy to put together and yet so Delicious ? my Dad absolutely loved it, will definitely cook again..

    1. Paulene @ Slow Cooker Central September 25, 2023

      I’m so happy he enjoyed it Di – I bet he loves all your cooking 🙂

  32. 5 stars
    Loved this one! didn’t change a thing and will definitely be on rotation , a great one to try if you are over the tomato based lamb shank recipes also.

  33. Perfect recipe . Wow.
    Did add some celery in with the carrots. Seared the lamb shanks,
    1/2 way added 2 chopped up cup mushrooms and some broccolini,
    otherwise followd the recipe.
    Cooked on high for 6 hours Was amazing! The lamb just fell off the bone, and was so tender. Served on a bed of potato and pumpkin mash.
    Definitely a keeper this recipe 😋

  34. Vicki Varney April 9, 2025

    10/10
    Doesn’t thicken much even with lid off for an hour so if looking for a thicker gravy, reduce liquid and do a cornflour slurry at the end.

    1. Paulene @ Slow Cooker Central April 10, 2025

      Thanks so much for sharing your feedback Vicki! We appreciate it so much 🙂

  35. 5 stars
    These lamb shanks were so tender just fell off the bone. I can’t wait to do this again. Thankyou for your amazing recipes pauline

    1. Paulene @ Slow Cooker Central June 25, 2025

      So pleased you enjoyed this great recipe shared with us by Gail 🙂

  36. Jennifer Powell July 7, 2025

    3 stars
    Mmmmm……the lamb literally fell off the bones. Delicious flavours, served with the mashed potato and greens. Another good recipe for my favourites file.

    1. Paulene @ Slow Cooker Central July 11, 2025

      That’s awesome to hear! Thanks for sharing your feedback Jennifer 🙂

  37. 5 stars
    Delicious! I used 500g rump steak instead of the lamb shanks, and reduced cooking time to 4 hours. Steak was lovely and tender! Also only used 1/2 packet of French Onion Soup. Will definitely be having this again. Thanks Paulene!

    1. Paulene @ Slow Cooker Central February 13, 2026

      How wonderful to hear how that turned out! Well done Anne 🙂 🙂

  38. Kylie Handley March 31, 2026

    5 stars
    Quick, easy and I love the flavour in the sauce, this is now my go to for lamb shanks!

    1. Paulene @ Slow Cooker Central March 31, 2026

      Thanks Kylie! So lovely to read your feedback 🙂 🙂

4.63 from 8 votes (1 rating without comment)

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