When the weather turns cold and I feel like we could all do with a few more vegetables in our diet, this is the kind of meal I am making: warm, comforting and almost entirely hands-off. This easy slow cooker vegetable soup packs seven vegetables into one pot and there is no sautéing or browning first. Just chop everything, add the stock and let the slow cooker do the work.
Butternut squash, carrots, parsnips and potato make this a root-vegetable-heavy soup that becomes naturally thick and creamy when blended, even without adding cream. There are no tomatoes either, so the flavour is mellow, slightly sweet and savoury rather than tomato based.
Blend it completely smooth, leave it chunky or do a bit of both. However you serve it, this is an easy way to get plenty of vegetables into a warming winter lunch or dinner without spending ages at the hob.
The added bonus is that my kids love it too. I usually add a little cheese on top of theirs and sometimes stir through some cooked pasta to make it more filling. It's an easy way to get some extra vegetables into the whole family.
Recipe update: This recipe was originally published on 6 October 2022 and was fully retested in September 2026 to check the cooking time and ingredient quantities. The original recipe still worked well, but I've expanded the instructions, tips and FAQs.
If you are looking for more vegetable-packed recipes, then why not try our popular Roasted Vegetable Winter Salad, quick 10 Minute Vegetable Teriyaki, comforting Cheesy Vegetable Pie or our easy Vegetable Pasta Bake?
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Jump to:
- Why You Will Love It
- Recipe Overview
- Why This Vegetable Soup Works So Well in the Slow Cooker
- Ingredients and Substitutions
- What Vegetables Can You Put in Slow Cooker Vegetable Soup?
- How to Make Slow Cooker Vegetable Soup
- How Long Does Vegetable Soup Take in the Slow Cooker?
- Smooth, Chunky or Creamy Vegetable Soup?
- Can You Make Slow Cooker Vegetable Soup Without Tomatoes?
- What To Serve With Slow Cooker Vegetable Soup
- Storage and Freezing
- Dannii's Top Tips
- Troubleshooting Guide
- Frequently Asked Questions
- More Vegetarian Soup Recipes
- Recipe
- Feedback
Why You Will Love It
- Seven vegetables in one bowl. This soup is packed with butternut squash, carrots, parsnips, potato, onion, celery and garlic, making it perfect for those days when you just feel like you need some extra veg.
- No sautéing. There is no need to soften the onion or brown anything first. Everything goes straight into the slow cooker with the stock.
- Perfect for winter. Root vegetables are made for comforting cold-weather soups. They become beautifully tender in the slow cooker and give the soup a naturally thick texture when blended.
- Creamy without needing cream. Potato and butternut squash give this soup plenty of body, so the single cream really is optional. Leave it out and the soup is vegan.
- Easy to adapt. Keep it smooth, leave it chunky, use up other vegetables or add chickpeas, lentils or pasta to make it more filling.
- Good for batch cooking. Make a pot now and keep portions in the fridge or freezer for easy lunches and dinners.
Recipe Overview
This is a true chop-and-drop slow cooker soup: just 10 minutes of prep, then 4 hours on HIGH or 8 hours on LOW.
Seven vegetables cook directly in the stock with no sautéing, then you can blend the soup completely smooth, leave it chunky or finish it with a little cream. It's ideal for busy winter days when you want plenty of vegetables with very little hands-on cooking.
- Prep time: 10 minutes
- Cook time: 4 hours HIGH / 8 hours LOW
- Serves: 4
- Difficulty: Easy
- Texture: Smooth and creamy, partly blended or chunky
- Flavour: Mellow, savoury and naturally sweet
- Best for: Easy winter lunches and dinners, batch cooking and getting in extra vegetables
- Diet: Gluten free and vegan without the optional cream
- Equipment: Slow cooker; stick blender if serving it smooth
Why This Vegetable Soup Works So Well in the Slow Cooker
I have made a lot of slow cooker recipes over the years, and sturdy root vegetables work especially well because they can cook gently until completely tender without needing much attention. It's a very forgiving soup.
In this soup, the butternut squash brings sweetness and colour, while the potato adds starch and helps thicken everything once blended. Carrots and parsnips add even more natural sweetness, and onion, celery and garlic give the soup its savoury base. I think it's why kids like it so much, because it's naturally sweet.
Because everything is going to cook for several hours, there is no need to sauté the vegetables first. That keeps the preparation simple: chop, add, stir and leave it alone.
The one thing that does make a difference is cutting the vegetables into small, fairly even pieces. Large chunks of root vegetables take much longer to soften, so an even dice gives you much more consistent results.
Ingredients and Substitutions
A full ingredients list, along with US Customary and Metric measurements, can be found in the recipe card at the end of this post.
- Butternut Squash - This makes up a good proportion of the soup and gives it its golden colour, natural sweetness and thick texture. Another winter squash would work too.
- Carrots - An inexpensive way to add colour and sweetness. There is no need to peel them if they are well scrubbed.
- Parsnips - Their sweet, earthy flavour works particularly well in a winter vegetable soup and they become beautifully soft when slow cooked.
- Potato - This is important for the texture. Once blended, the potato helps make the soup thick and creamy without needing flour or lots of dairy. Sweet potato can be used if you want an even sweeter soup, but we find that a bit much.
- Onion - Adds the savoury base. Shallots or leeks can also work if that is what you have.
- Garlic - Fresh garlic is ideal, although ready-crushed garlic is a useful shortcut.
- Celery - Adds depth of flavour without making the finished soup taste strongly of celery.
- Vegetable stock - Use a stock that you like the flavour of, as it forms the liquid base of the soup. Choose a lower-salt stock if you are making it for young children.
- Salt and pepper - Season to taste. The amount needed will depend on how salty your stock is.
- Single cream (optional) - Stir a little through at the end if you want an extra-rich finish. The soup is still creamy without it, and leaving it out keeps the recipe vegan.
What Vegetables Can You Put in Slow Cooker Vegetable Soup?
One of the best things about homemade vegetable soup is how adaptable it is, and it is a useful way to clear out vegetables that need using.
Hardy vegetables such as butternut squash, carrots, parsnips, potato, sweet potato and other root vegetables are particularly good for slow cooking because they need time to soften.
You can also use vegetables such as leeks, peppers, cabbage, broccoli, courgette (zucchini), green beans and asparagus. Bear in mind that softer vegetables cook more quickly than root vegetables.
If you want to keep vegetables such as peas, spinach or other greens looking fresh and distinct, stir them in later rather than cooking them for the full time. If you are planning to blend the entire soup, their final texture matters much less.
This recipe is intentionally quite golden in colour. Adding lots of spinach, broccoli or other green vegetables will change both the flavour and colour, which is not a problem - just expect a different soup.
To make this slow cooker veg soup more filling, you have a few options. You could add a can of cooked lentils which would give it a protein boost, or even some cooked chickpeas.
For a filling but child-friendly option, you could stir in some cooked pasta. A small pasta shape such as macaroni works well.
How to Make Slow Cooker Vegetable Soup
- Prepare the vegetables: Cut the vegetables into small, evenly sized pieces and add them to the slow cooker.
- Add the stock: Pour over the vegetable stock, season and give everything a good stir.
- Slow cook: Cook on HIGH for 4 hours or 8 hours on LOW, or until all the root vegetables are completely tender. The vegetables should be soft enough to blend easily.
- Blend to your preferred texture: Use a stick blender directly in the slow cooker and blend until the soup is as smooth as you like.
- Finish and serve: Taste and adjust the seasoning. Stir in a little single cream if using, then serve hot.
How Long Does Vegetable Soup Take in the Slow Cooker?
This vegetable soup takes around 4 hours on HIGH. The most important test for doneness is not the clock but the vegetables: the carrot, parsnip, potato and squash should all be completely tender before you blend the soup. You can also cook it for 8 hours on LOW.
Slow cookers can vary in size, temperature and how quickly they cook, and larger pieces of root vegetable will also need longer. Cutting everything into a similar small dice gives the most reliable result.
Smooth, Chunky or Creamy Vegetable Soup?
You don't have to serve this soup just one way.
For a smooth vegetable soup, blend everything until silky. This is how my family prefers it.
For a thick soup with some texture, remove a couple of ladles of vegetables before blending, then stir them back into the smooth soup.
For a chunky vegetable soup, don't blend it at all. Keep in mind that without blending, the liquid will feel more like a broth because the potato and squash have not been blended through it to thicken it.
For a creamy slow cooker vegetable soup, blend it very thoroughly and stir in a little single cream at the end.
You can also make it creamy without cream. The butternut squash and potato give the blended soup a naturally velvety texture, so dairy is definitely not essential.
Can You Make Slow Cooker Vegetable Soup Without Tomatoes?
Yes - this recipe contains no tomatoes at all.
A lot of vegetable soup recipes use chopped tomatoes or tomato paste, but this one gets its flavour and body from vegetables and stock instead. That gives it a lighter golden colour and lets the sweetness of the butternut squash, carrot and parsnip come through.
If you specifically want a slow cooker vegetable soup without tomatoes, you do not need to make any changes to this recipe.
What To Serve With Slow Cooker Vegetable Soup
For me, the simplest option is plenty of crusty bread and butter. Our Slow Cooker Bread works particularly well if you want to make the whole meal feel extra cosy.
You could also serve it with Easy Homemade Flatbreads, Garlic and Rosemary Focaccia or warm pitta bread.
For some crunch, add Air Fryer Croutons or Sourdough Croutons just before serving rather than making a separate batch of croutons from scratch.
If you are serving the soup as a main meal rather than lunch or a starter, adding chickpeas or lentils and serving it with bread makes it much more substantial.
Storage and Freezing
In the fridge: Allow the soup to cool and transfer it to an airtight container. Keep it in the fridge for 3-4 days.
In the freezer: Put the cooled soup into suitable freezer containers, leaving a little space for expansion. Freeze for 2-3 months. We really like these soup cube moulds for freezing.
To defrost: Defrost overnight in the fridge.
To reheat: Heat gently on the hob until piping hot throughout. If the soup has thickened in the fridge, add a splash of vegetable stock or water until it reaches the consistency you want.
If you added cream before freezing, the soup may look slightly separated once defrosted. Stir or whisk it well as it reheats to bring it back together.
Dannii's Top Tips
- Cut the root vegetables into small, evenly sized pieces. This is the most important thing you can do to make sure everything becomes tender at the same time.
- You don't need to peel carrots or potatoes if their skins are in good condition - give them a thorough scrub instead.
- Don't automatically add extra liquid at the beginning. Slow cookers lose very little moisture while cooking and it is much easier to thin a thick soup after blending than to rescue a watery one.
- Taste the soup after blending before adding more salt. The amount you need depends heavily on the stock you use.
- If the finished soup is too thick, stir in a little extra hot vegetable stock at a time until it reaches your preferred consistency.
- If you are using a jug blender rather than a stick blender, take care when blending hot liquid and follow the manufacturer's instructions for your blender.
Troubleshooting Guide
|
Problem |
Likely cause |
Fix |
|
Soup is too thin or watery |
Too much liquid, frozen vegetables have released extra water, or the soup hasn't been blended enough |
Blend the soup thoroughly first, as the potato and squash will naturally thicken it. Next time, hold back some of the stock and add more after blending only if needed. |
|
Soup is too thick |
The vegetable-to-liquid ratio was higher, or the soup has thickened as it cooled |
Stir in hot vegetable stock or water a little at a time until it reaches the consistency you want. |
|
Vegetables are still hard |
The pieces were too large or uneven, or your slow cooker cooks at a lower temperature |
Keep cooking until the root vegetables are completely tender before blending. Next time, cut everything into a small, even dice. |
|
Soup tastes bland |
The stock was mild or low-salt, or it needs more seasoning after blending |
Taste only once the soup has been blended, then adjust the salt and pepper. The strength and saltiness of vegetable stocks varies considerably. |
|
Cream has separated after freezing |
Dairy can separate during freezing and reheating |
Reheat gently and stir or whisk well. For the best texture, freeze the soup without the cream and add it after reheating. |
Frequently Asked Questions
Yes. This recipe is specifically designed so the vegetables can go into the slow cooker raw. There is no need to sauté the onion, garlic or celery first.
Yes, although frozen vegetables can release more liquid while cooking. If you are replacing a significant amount of the fresh vegetables with frozen ones, start with a little less stock and add more after blending if needed.
Yes. The soup itself is vegan as long as you use vegetable stock. Simply leave out the optional single cream or use a plant-based alternative.
No. You can blend the whole pot until smooth, blend just part of it for a thicker soup with some texture, or leave the vegetables completely chunky.
Yes. Stirring through cooked lentils or chickpeas is an easy way to make the soup more substantial. They work particularly well if you are serving it as a main meal.
More Vegetarian Soup Recipes
If you've tried this slow cooker veggie soup recipe, then let us know how you got on in the comments below.
Tag us in your creations on Instagram @hungryhealthyhappy and use the hashtag #hungryhealthyhappy too.
Recipe
Easy Slow Cooker Vegetable Soup
Recipe Video
Ingredients
- 700 g (5 cups) of Butternut squash
- 2 Carrot
- 2 Parsnips
- 1 Onion
- 1 Potato
- 2 ribs of Celery
- 2 Garlic clove
- ¼ teaspoon of Fine sea salt
- ½ teaspoon of Ground black pepper
- 1 litre (4¼ cups) of Vegetable stock
- Single cream - for serving; optional
Instructions
- Prepare the vegetables: Cut the vegetables into small, evenly sized pieces and add them to the slow cooker.
- Add the stock: Pour over the vegetable stock, season and give everything a good stir.
- Slow cook: Cook on HIGH for 4 hours or on LOW for 8 hours, or until all the root vegetables are completely tender. The vegetables should be soft enough to blend easily.
- Blend to your preferred texture: Use a stick blender directly in the slow cooker and blend until the soup is as smooth as you like.
- Finish and serve: Taste and adjust the seasoning. Stir in a little single cream if using, then serve hot.
Recipe Notes
- Cut the root vegetables into small, evenly sized pieces. This is the most important thing you can do to make sure everything becomes tender at the same time.
- You don't need to peel carrots or potatoes if their skins are in good condition - give them a thorough scrub instead.
- Don't automatically add extra liquid at the beginning. Slow cookers lose very little moisture while cooking and it is much easier to thin a thick soup after blending than to rescue a watery one.
- Taste the soup after blending before adding more salt. The amount you need depends heavily on the stock you use.
- If the finished soup is too thick, stir in a little extra hot vegetable stock at a time until it reaches your preferred consistency.
- If you are using a jug blender rather than a stick blender, take care when blending hot liquid and follow the manufacturer's instructions for your blender.
Nutritional Information
Where nutritional information is provided, it is approximate and calculated using online tools. Values can vary depending on the ingredients and brands used, but we endeavour to be as accurate as possible.
All timings are a guide and may vary depending on the ingredients, equipment and, where relevant, the appliance used. Changing the serving size may also affect the time needed.
Dana says
Love this soup! It's so velvety and dreamy.
Ieva says
Delicious and so creamy (even though we skipped the cream). Very filling and comforting too for the cold evenings! We served two portions of it with Aleppo pepper on top and slices of sourdough bread and froze the rest for another time! Great batch cooking recipe that we'll definitely enjoy more this winter!
Jess says
LOVE that this is made in the crockpot. Super easy.
MacKenzie says
Tried this recipe last week and the flavors were perfect. The addition of sour cream makes it so creamy and comforting.
Andrea says
Love that this is a slow cooker recipe and that you blend the vegetables to make a creamy soup. It looks delicious!
Lyn says
Adding everything to my grocery list right now! This looks so warming and comforting. I can't wait to dig in later!
Kathleen says
Looks so smooth, creamy and comforting. It's perfect for a rainy or chilly day.
Claudia Lamascolo says
perfect fall soup! great instructions and it came perfect! we just love this recipe!
kushigalu says
Love how creamy, delicious and flavorful this soup recipe is. Thanks for sharing.
Glenda says
A perfect lunch on a perfect Fall day! We had a little crusty bread and a salad with it and it was pure heaven! Thanks for sharing your recipe!