Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

So summer is pretty much over, now it’s time to break out the slow cooker for some hearty soups and stews. This Slow Cooker Syn Free Ham, Leek and Potato Soup is just the thing for lunch or an evening meal when the nights start drawing in.
Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

For the full list of ingredients and comprehensive instructions, please see the recipe card at the end of this post. Before you scroll, there’s important stuff in the blurb 👍

This Slow Cooker Syn Free Ham, Leek and Potato Soup couldn’t be easier. Who would have thought 4 simple ingredients could be so tasty?!

Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

There’s not much more I can say about this recipe other than you really should try it!!

Want some more soup recipes, like this Slow Cooker Syn Free Ham, Leek and Potato Soup?


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If you haven’t got a slow cooker you can still make this in a pan on the stove, or you could head over to Amazon to pick one up.

The Instant Pot

What can I say about the Instant Pot? It’s like a like a slow cooker/pressure cooker hybrid, and it’s probably one of our favourite, and most used kitchen gadgets.

Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

If you’ve never heard of it you really should go and check it out over on Amazon. Imagine the best Slow Cooker in the world, then times that by a hundred. There’s not much that it can’t do!

Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

It’s a slow cooker and a pressure cooker, which means you can cook recipes like this Slow Cooker Syn Free Ham, Leek and Potato Soup in about 30 minutes.

Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

Remember the pressure cookers of old that would splutter and rock, and make all sorts of scary noises? None of that with the Instant Pot. Just set the time, close the lid and let it do it’s thing. It even keeps your food warm once it’s finished cooking! How good is that?

Whenever we need to replace oil in cooking we use Frylight. Perfect for everyday frying and cooking, it delivers exactly one calorie per spray, which makes it Syn free! The Avocado or Olive Oil flavours are ideal for this Slow Cooker Syn Free Ham, Leek and Potato Soup recipe.

Frylight Find Out More

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Slow Cooker Syn Free Ham, Leek and Potato Soup | Slimming World

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Syn Free Ham, Leek and Potato Soup

Votes: 44
Rating: 3.73
Rate this recipe!


Prep Time

Cooking Time

people 5 minutes 4 hours



Slimming World 

306kcal 7

Smart Points (Flex/Freestyle)



Per people Per people Per people
Suitable For Freezing icon Dairy Free icon
Please Note - If portions are changed, then points/values will not change and will need to be worked out by yourself. We're working on this!
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  1. First sauté the leeks in a few sprays of Frylight, then add them to the slow cooker. If you use an Instant Pot set it to sauté
  2. When the leeks start to soften add the ham and the potatoes
  3. Top up with the stock
  4. Set to slow cook for 4 hours, or until the ham is tender and the potatoes soft
  5. When everything is cooked if you want the soup a bit thicker roughly mash up some of the potato, with a potato masher, just enough to thicken the soup slightly, then cook for another 30 minutes or so

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This recipe can be frozen, but please remember to do the following;

- Freeze it as soon as it is cold enough.
- Use a container or bag that is suitable for freezing.
- Defrost thoroughly before reheating (you can use the defrost setting on your microwave.)
- Make sure it is piping hot all the way through before serving.


Syn values given are correct at time of writing but may not always be accurate.

This website is UNOFFICIAL and in NO WAY part of or representative of Slimming World. 

We aren’t trained by Slimming World nor authorised to give Slimming World advice. Any advice given here should not replace the advice of your Slimming World consultant.

Ideally, you should check with Slimming world for the most up to date Syn values using official resources such as; the Syns calculator, Syns Online on LifelineOnline or by calling the Syns Hotline on (0906) 851 8518.

Although attempts to provide accurate nutritional information, these figures should be considered estimates. Varying factors such as product types or brands purchased, natural fluctuations in fresh produce, and the way ingredients are processed change the effective nutritional information in any given recipe. Under no circumstances will be responsible for any loss or damage resulting for your reliance on nutritional information.

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    1. Hi Becky
      If you’re cooking on the hob, use a lid and simmer for approx 20-25 minutes, until the ham pieces are cooked and the potatoes are tender. You may need to top up with more stock, as some of the liquid will evaporate. Hope that helps.

    1. Hi Paula
      I would cook on the hob with a lid on the pan for 20-25 mins, until the ham is cooked and the potatoes are tender. Keep an eye on the levels and add more stock if necessary. (It will evaporate more quickly due to being cooked on the hob.) Hope that helps.

  1. Hi,

    I have a soup maker. If I cut the gammon into slightly smaller chunks do you think it’d still work? I think the standard setting takes 20-25 mins to cook.

    1. Hi Maria
      If you were cooking this soup on the hob, you’d need to cook for around 25 mins, so I would have thought the soup maker will work too. Just check the ham at the end of the cooking time to make sure it’s cooked thoroughly.

  2. Going to try this very soon. Tempted to add a can of butter beans too (not that the recipe needs it I just love them) would be lush half mashed with the potatoes at the end. Thanks for another winner 🙂

    1. Hi Louise
      Yes, the recipe can be cooked on the hob. Simmer until the vegetables, particularly the potatoes, are tender. You’ll also need to ensure that the gammon is cooked through. You may need to add some more boiling water to stop it getting too thick, as the liquid will evaporate on the hob much more quickly than in the slow cooker. Hope that helps.

    1. Hi Hananh
      Step 5 in the recipe suggests that you can roughly mash some of the soup if you’d like a slightly thicker texture, but it’s designed to be a rustic-style chunky soup, so no need to blend. 🙂

    1. Hi Sheila
      This recipe gives a thick and satisfying soup. Quark isn’t really necessary, and you run the risk of it splitting in the hot liquid, which would spoil the flavour and texture of the soup. 🙂

    1. Hi Lynda
      We haven’t tried this recipe in a soup maker, but there’s no reason why it wouldn’t work. You will obviously need to ensure that the ham is fully cooked. Let us know how you get on with it. 🙂

  3. I made this today in my slow cooker for 12 hours on low but the potatoes werent cooked well. I used jacket potatoes.
    Unsmoked gammon joint isn’t too salty.
    All in all a lovely soup.

    1. Hi Kate
      It’s often the case that root vegetables take longest to cook in the slow cooker. It might help to cut them into smaller pieces next time. Glad you enjoyed the soup! 🙂

  4. This soup looks amazing and I want to cook it, only my pressure cooker isn’t an instant pot and doesn’t have a slow cooker mode. Would you recommend that I just cook it in my slow cooker or could this still be made in the pressure cooker, on the soup setting or meat setting and if so how many min on which setting please?

    1. Hi Joanne
      You can make this in your slow cooker! Just sauté the leeks in a pan, then you can pop them straight into the slow cooker with the other ingredients and follow the rest of the instructions. Thanks for getting in touch!

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Slimming World Recipes
A blog started by 2 chefs on their Slimming World journey, evolving into an epic adventure shared by many!