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Slow Cooker Gammon

Slow cooker gammon is a quick to prepare a meal with tasty results.

You can keep the recipe super simple and literally just add the gammon and a little water. Or, you can add some additional ingredients to create some different tastes.

Either way, the preparation time is very short.

slices of gammon from slow cooker

What you need

gammon joint, carrots, onion, cloves next to a slow cooker
  • Slow cooker – the bigger the better, cook a larger gammon joint and enjoy the leftovers!
  • Gammon joint – smoked or unsmoked
  • Vegetables – you can add any you like, I tend to add onions and carrots
  • Cloves – this is optional, I pierce them into the gammon before I cook it
  • Liquid – either just plain water or, experiment with some different liquids (see below!)
  • Honey/Mustard – again, optional, you can glaze the cooked gammon and finish it off in an oven

Slow Cooker Gammon Joint – 5 Different Ways!

1. How To Cook A Gammon In A Slow Cooker With Water

This is the quickest method. You just need to place the gammon in the slow cooker, and then pour some water around it – around 250ml is enough, which should be about 2 to 3 inches deep.

gammon in slow cooker with onions, carrots and water

Do I Need To Add Water To Slow Cooker Gammon?

No, like with other slow cooker recipes, there is no need to put in any additional liquid. I like to put in a little at the bottom as I find it helps the gammon to come out a little more moist. But, if you don’t add any water to the slow cooker, the gammon won’t burn.

2. Slow Cooker Gammon In Coke

Slow cooking a gammon joint in coke might seem like a strange idea. But if you’ve not tried, it, you should!

The gammon does not end up coming out sweet as you would imagine – and it’s best to use normal full fat coke (although I know some people do use Diet Coke, especially to make it a Slimming World friendly recipe).

You can also use cherry coke, although I’ve not tried this myself, I have heard it comes out tasty.

3. Slow Cooker Gammon In Cider

Cooking a gammon joint in some dry cider is equally as tasty as the coke. Use 400ml/500ml of dry cider and pour it over the gammon joint in the slow cooker. You can also add in some cloves, peppercorns and some chopped up onions.

4. Slow Cooker Gammon In Apple Juice

If cider isn’t your thing, you can substitute it for apple juice. Use a similar quantity (400-500ml) and pour it over the gammon joint. Alternatively you can also use pineapple juice, or a large tin or 2 of pineapple chunks in juice.

5. Gammon In Slow Cooker With Honey

If you are making a glaze for the gammon (see details further down), you can use honey then before putting it in the oven.

You can also use some honey during the slow cooking process. Just mix 5 tbsp of honey with about 250ml water – hot water would be better as it will help the honey dissolve. You can also stir in some mustard and make it a honey and mustard gammon. 

How Can I Make Pulled Ham?

Leave the gammon in the slow cooker for a longer length of time so that it becomes more tender and you are able to pull it apart and shred it. Leave it in for at least 8 hours on low. Use 2 forks to shred it. Much like slow cooker pulled pork.

Should I Soak Gammon Before Cooking It?

If you have bought a smoked gammon you might want to pre-soak, or boil away some of the salt before cooking it.

You don’t have to do it – it depends on how salty you like your gammon.

If you do want to reduce the salt content, ideally you will soak it in a bowl of fresh water for at least 12 hours before you want to cook it. Make sure the whole of the gammon joint is covered.

However, if you don’t have the time, you can boil away the salt. Simply place the whole gammon joint in a large enough saucepan and bring it to the boil. 

Do I Cook Gammon In Plastic?

gammon with plastic still on in slow cooker

Gammon joints come with plastic wrapped around them. I used to always leave this on (!) but have since been informed that this should be removed during the cooking time. I always thought it helped to hold the joint together?  

How Long To Cook Gammon In A Slow Cooker

Cook it on low for 6 to 8 hours, or high for 4 to 5 hours.

How To Tell If Gammon Is Cooked

Insert a sharp knife inside the gammon and pull it out. If you struggle to take it out, or it feels a bit springy, the meat isn’t cooked. Return it to the slow cooker to let it cook for longer.

How To Make A Gammon Glaze 

You can either serve the gammon straight from the slow cooker, or add a glaze and cook it in an oven for 15 to 20 minutes. If I’m making this recipe for a regular week night meal I go with the first option, but if I am making it for a weekend meal, or a special occasion (like Christmas!) I will make the effort to glaze it too – it does taste amazing!

What To Do With Leftover Gammon

ham and potato soup maker recipe
Leftover gammon used in potato and ham soup

If your slow cooker has the space it is well worth buying a large gammon joint so that you have some for leftovers!

There are lots of ways to serve leftover gammon;

slow cooker gammon recipe

Slow Cooker Gammon

Yield: 4-6
Prep Time: 5 minutes
Cook Time: 4 hours
Total Time: 4 hours 5 minutes

Slow cooker gammon is a fantastic way to enjoy a soft and tender ham that is packed with flavour.


  • 1kg gammon joint (smoked or unsmoked)
  • 1 onion
  • Cloves/peppercorns
  • 250ml water*


  1. Place gammon joint in slow cooker
  2. Add chopped up onion (and any other vegetables), and peppercorns around the gammon
  3. Pour in water (or your chosen liquid)
  4. Place lid on slow cooker and set off for 4 hours on high, or 6-8 hours on low
  5. Remove gammon from the slow cooker and leave to stand before carving (unless you are adding a glaze) - serve hot or cold.
  6. Optional glaze: score the gammon joint and rub some honey over the top. You can also mix in some sugar and/or mustard. Place in a preheated oven (200C/Gas Mark 7) and cook for 10 to 15 minutes


*You can swap the water for either; cola, apple juice, pineapple juice or dry cider.

Nutrition Information:
Yield: 6
Amount Per Serving: Calories: 245

Did you make this recipe?

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08/08/2022 09:04 am GMT

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Friday 24th of December 2021

Hi I stupidly cooked my gammon on low for 4.5 hours today, I am worried it isn’t long enough now? Can cook further in the oven tomorrow to finish it? I have cooled it now and it’s refrigerated?

Liana Green

Saturday 25th of December 2021

Hi Sarah - 4.5 hours might be long enough - did you check if it was cooked all the way through? We also cooked ours in the slow cooker today and will be reheating it in the oven tomorrow - just remember to heat it so that it is piping hot all the way through. I would also loosely wrap it in foil to stop it from drying out. Hope that helps!


Friday 7th of May 2021

Hi Liana Are you suppose to cook the gammon in the plastic around it

Liana Green

Tuesday 11th of May 2021

Hi Lyn - well I always used to leave it on but I have since been informed you should remove it! I always thought it should be left on to help hold it together, but apparently not. So, in short, yes, remove it!

Mr Roger Birkin

Friday 1st of January 2021

Please can you advise the correct amount of liquid as am confused as you state 250ml and then you say 450/500ml. I propose cooking a smaller gammon joint than tour 1kg. One and am going to try the Coke method but need to know the amount please. Thank you

Liana Green

Monday 4th of January 2021

Hi Roger - the amount of liquid used will depend - you can cook gammon in a slow cooker without any liquid at all, or, if you just want to add a little water to make it more moist then I add around 250ml. If I am using the liquid to change the taste of the gammon, say with cider or apple juice I will use around 500ml, sometimes more, depending on the size of the gammon.

For the coke method, use enough so that the gammon is submerged in it, or as much as it can be - this will probably be around 2L of coke (full fat is best).

I hope that helps - let me know if you have any questions- I hope you enjoy it!

Tracie Price

Thursday 24th of December 2020

How much coke please. And thankyou for the recipe. Have a wonderful Christmas xxx


Thursday 24th of December 2020

Hi Liana, I’m cooking our gammon for Christmas tomorrow, however it’s 2.5kg, would it need to be in the slow cooker longer? What heat and how long would you recommend? Many thanks!!!! Molly

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