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Keto Cauliflower Leek Soup – vegetarian

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4.9 from 279 votes
By Carine - - 3 Comments

A tasty keto cauliflower leek soup to detox and nourish your body after too much eating. An-after holidays must-have recipe to cleanse our body and reset our diet with fewer carbs and starchy food.

I hope you all had lovely holidays! My Christmas was fabulous. I could watch my girl for hours opening her presents. Such a great time. I know that all you want to read is what makes this soup so great to detox your body. I am sorry if I first need to share with you my feelings today. Tomorrow is a big day for me. I will finally meet him — my baby boy. After 38 weeks, I have been scheduled for a C-section to bring Luka to the world.

I am very excited and so scared too. Some people think that a C-section is ‘easy’ compared to natural birth. I don’t think there is an easy way to give birth. Birth is always a scary process as we never know what can happen, what we expect! Anyway, that is my last live post on the blog. I will keep feeding the blog during the next 4 months with recipes I wrote in advance for you. Today, I am sharing another yummy soup that  I planned to freeze and eat as a light dinner after the baby is born.

Leek Cauliflower Soup – my secret to a flavorsome low carb soup

I love this simple leek cauliflower soup. Especially because it’s light and doesn’t use any starchy vegetables. My secret for a tasty soup with low carb vegetables is to roast them first with shallots, garlic, olive oil, and spices. It’s a straightforward step that adds lots of flavor to any low carb soup. I love to use vegetable stock as a base for this soup, but chicken stock is a great option, too. Leek and cauliflower are both very low-carb vegetables.

They contain very few calories as well, and they are both amazing sources of fibers, vitamins A and C. Check out my keto vegetable list for a review of all common vegetables! The texture is not very thick or creamy. It’s a light soup with lots of spices flavor, perfect for a light family dinner. I drizzle virgin olive oil on top of my bowl. Emma loves to add grated mozzarella. I guess all kids love melted string cheese in their soup, and it’s a good source of calcium for them.

leek cauliflower soup

So if you indulged too much in ham and potatoes this Christmas, give a try to this leek cauliflower soup. You won’t regret it!

More low -carb soup recipes to try

If you like Keto soups, try my following recipes:

Made this soup? Share a picture with me on Instagram! 

xoxo Carine

Recipe Card

Leek Cauliflower Soup

leek parsnip soup
6.7gNet Carbs
4.9 from 279 votes
Prep Time: 5 mins
Cook Time: 25 mins
Total Time: 30 mins
Net Carbs 6.7g
Fat 11g
Protein 2.4g
Calories 119kcal
Author: Carine Claudepierre
12 people
A low-carb detox soup perfect for enjoying as a cleanse soup after holidays. This Leek cauliflower soup is light, with delicious spices flavors.

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Net Carbs
4.9 from 279 votes
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To roast vegetables

  • 3 tbsp Extra Virgin Olive Oil
  • 2 Leek remove the very green top part, trim feet, roughly chop
  • 1 small Onion peeled, roughly chopped
  • 1 large Cauliflower Head chopped into small florets (about 8 cups)


  • 5 cups Vegetable Stock
  • 1 cup sour cream
  • 1 cup Heavy Cream or coconut cream if vegan
  • 2 Garlic Clove peeled and smashed
  • ½ teaspoon thyme
  • ½ tsp salt
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  • Preheat oven to 180°C (350°F).
  • Spread the chopped vegetables: leek, cauliflower, onion, onto a baking tray in a single layer.
  • Drizzle the olive oil onto the vegetables and toss everything together until the vegetables are well coated.
  • Roast vegetables for 20-30 minutes, tossing vegetables every 5-10 minutes. The vegetables must be tender enough to be blended after the roasted process.
  • Meanwhile, pour the vegetable stock with thyme and salt into a large pot (must fit all your vegetables!) and bring to a simmer.
  • Once vegetables have roasted through, place them into the pot with stock.
  • Add in heavy cream and sour cream.
  • Blend with an immersion blender until it forms a creamy smooth soup. Adjust the quantity of stock to reach the desired consistency. The more stock you add, the more liquid the soup will be.
  • Serve with 2-4 tablespoons of grated cheddar per bowl or a simple drizzle of olive oil and fresh herbs.
  • Store up to 3 days in the fridge or freeze for later in airtight containers. Always wait for the soup to reach room temperature before packing in freezing boxes.
Net carbs: 6.7 g per serving. Recipe serves 12 bowls (3/4 cup).
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Nutrition Facts
Leek Cauliflower Soup
Amount Per Serving (1 serve)
Calories 119 Calories from Fat 99
% Daily Value*
Fat 11g17%
Carbohydrates 8.7g3%
Fiber 2g8%
Protein 2.4g5%
Net Carbs 6.7g
* Percent Daily Values are based on a 2000 calorie diet.

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    3 thoughts on Keto Cauliflower Leek Soup – vegetarian
  1. 5 stars
    Awesome recipe
    I used Broccoli instead of cauliflower and used cream instead of sour cream
    I did not have thyme and instead use ginger..Your recipes are really great
    continue with your good work..
    I have recommended to many of my friends..Also added some cottage cheese cubes
    tasted yum????????


The recipes, instructions, and articles on this website should not be taken or used as medical advice. You must consult with your doctor before starting on a keto or low-carb diet. The nutritional data provided on Sweetashoney is to be used as indicative only. The nutrition data is calculated using WP Recipe Maker. Net Carbs is calculated by removing the fiber and some sweeteners from the total Carbohydrates. As an example, a recipe with 10 grams of Carbs per 100 grams that contains 3 grams of erythritol and 5 grams of fiber will have a net carbs content of 2 grams. Some sweeteners are excluded because they are not metabolized. You should always calculate the nutritional data yourself instead of relying on Sweetashoney's data. Sweetashoney and its recipes and articles are not intended to cure, prevent, diagnose, or treat any disease. Sweetashoney cannot be liable for adverse reactions or any other outcome resulting from the use of recipes or advice found on the Website.

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