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Slow Cooker Leek and Potato Soup

Slow cooker leek and potato soup is a simple, hearty meal that will fill your home with an amazing smell. It takes about 4 hours to cook in the slow cooker but it’s worth the wait!

Leek and potato soup is a slow cooker meal that you can’t go wrong with.

It’s healthy, and inexpensive.

Plus, it’s versatile! You can add some bacon in, or keep it vegetarian, perhaps adding in different vegetables.

The recipe below is for a basic leek and potato soup which will be enough for 4 people.

slow cooker and leek potato soup in 2 bowls with bread on top

How To Make Leek and Potato Soup in a Slow Cooker

It’s made with potatoes, carrots, celery, onion, garlic and leeks in a chicken or vegetable stock. The vegetables simmer away until tender before adding some optional cream or milk to create a creamy texture.

This soup can be served as it is, or topped with chives or parsley for garnish. Serve this hearty dish with crusty bread on the side for dipping!

ingredients slow cooker leek potato soup

What You Need

  • Potatoes – Maris Pipers are a good choice, I use about 6-8 medium sized ones
  • Leeks – I use 3 or 4
  • Onion
  • Butter
  • Vegetable or chicken stock
  • Seasoning
  • Optionally garnish with crispy bacon bits and/or stir in some stilton cheese or single cream

Prepare The Ingredients

chopped leek and potato ready to go in the slow cooker

Prepare the vegetables by chopping them up. You don’t have to peel the potatoes if you don’t want to, but try to cut them to similar sizes if possible, this way they will cook more evenly. Add any seasoning according to your own tastes.

Add It All To The Slow Cooker

add stock to chopped leek and potato soup in slow cooker

You can use either vegetable or chicken stock, I use 2 stock pots or cubes in about 1 litre of boiling water. Pour enough stock in so that it covers everything in the slow cooker. Remember the vegetables will release some liquid during the cooking time.

cover chopped leek and potato soup in slow cooker with stock

Put the lid on and cook on low for 6 to 8 hours, or high for 4 hours. Check the vegetables are tender and cooked through.

You can either serve the soup chunky, or grab a hand blender to make it a smooth soup. Alternatively you could use a potato masher and create a consistency that is in between chunky and smooth.

If the soup is too thick in consistency for you, stir in some extra stock to thin it out.

Add any extra seasoning as required and optionally stir in some cream or crumbled stilton cheese, and/or crispy bacon bits.

leek and potato soup in bowls, served from slow cooker.

I hope you like this slow cooker recipe! If you make it please do let me know in the comments how it went. If you want to join me on Facebook I have a private slow cooker recipe group – I hope to see you there!

This recipe appears in my slow cooker recipe book.

leek and potato soup slow cooker recipe

Slow Cooker Leek and Potato Soup

Yield: 4-6
Prep Time: 20 minutes
Cook Time: 6 hours
Total Time: 6 hours 20 minutes

Slow cooker leek and potato soup is a simple, hearty meal that will fill your home with an amazing smell. It takes about 4 hours to cook in the slow cooker but it's worth the wait!


  • 8 potatoes, chopped
  • 3 leeks, chopped
  • 1 onion, chopped
  • 2 tbsp. butter
  • 2 x vegetable stock pots/cubes
  • 1 litre boiling water
  • Seasoning - salt/celery salt/black pepper
  • Optional: single cream, cooked bacon and/or Stilton cheese


  1. Peel and chop potatoes to equal sizes and add to slow cooker.
  2. Add leeks, onions and butter.
  3. Dilute 2 stock cubes in 1 litre of boiling water.
  4. Add stock to the slow cooker so that it just covers the ingredients. Add any preferred seasoning and stir everything together.
  5. Set off on high for 4 hours, or low for 6 - 8 hours.
  6. When finished - the ingredients should be soft - blend with a stick blender, or, transfer to a large blender. If you prefer a chunkier consistency, you might choose just to pulse or mash the soup with a potato masher.


As a variation, stir in some diced Stilton cheese at the end and garnish with some chopped crispy bacon.

Nutrition Information:
Yield: 4 Serving Size: 1
Amount Per Serving: Calories: 512Total Fat: 14gSaturated Fat: 8gTrans Fat: 0gUnsaturated Fat: 5gCholesterol: 38mgSodium: 1209mgCarbohydrates: 85gFiber: 9gSugar: 8gProtein: 15g

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