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By Martin Smith
Slow Cooker Vegetable Soup
6 steps
Prep:15minCook:5h
A simple and versatile slow cooker vegetable soup, perfect for an easy lunch or supper. Make it ahead and enjoy a nutritious meal that can be refrigerated or frozen for later.
Updated at: Fri, 06 Feb 2026 12:00:25 GMT
Nutrition balance score
Great
Glycemic Index
59
Moderate
Glycemic Load
19
Moderate
Nutrition per serving
Calories210.5 kcal (11%)
Total Fat8.3 g (12%)
Carbs31.5 g (12%)
Sugars10.1 g (11%)
Protein4.6 g (9%)
Sodium704.5 mg (35%)
Fiber5.7 g (20%)
% Daily Values based on a 2,000 calorie diet
Ingredients
4 servings
2 Tbspsunflower oil
2onions
finely chopped
1celery stick
cut into 1cm slices
250gcarrots
peeled and cut into chunks
275gswede
small, peeled and chopped
375gpotatoes
peeled and cut into chunks
1 tspmixed dried herbs
600mlvegetable stock
hot, made with 2 stock cubes
½ tspground turmeric
optional
100mlmilk
or water
salt
freshly ground black pepper
fresh flatleaf parsley
Chopped, to serve, optional
Instructions
Step 1
Heat the oil in a large non-stick frying pan and fry the onion, celery, and carrots for 4-5 minutes, stirring regularly until beginning to soften.
Step 2
Tip into a slow cooker and add the swede, potatoes, mixed herbs, stock, and turmeric if using. Season with lots of pepper and stir well.
Step 3
Cover and cook on High for 3-4 hours or Low for 6-8 hours, until the vegetables are just tender.
Step 4
Take ladles of the soup and transfer to a large bowl. Using a stick blender, blitz to a puree then return to the slow cooker pot and mix thoroughly to thicken the soup.
Step 5
Stir in enough milk or water to reach the preferred consistency then cover and cook on High for a further 30 minutes.
Step 6
Season with salt and pepper and scatter over the parsley if using. Serve with warm crusty bread.












