Keto Cauliflower Soup | The Best Roasted Cauliflower Soup

A white bowl filled with keto cauliflower soup. The head of a spoon is scooping some of the soup and there is a cauliflower floret in front of the spoon. A thyme sprig is in the background and everything is on a white counter.

5 from 3 reviews

This keto cauliflower soup is healthy, comforting, and just downright delicious. It has a creamy base packed with roasted cauliflower, a blend of seasonings, and vegetables to give it an unmatched flavor. And, honestly, when it comes to low carb soup, it doesn't get any better than this cauliflower one. 



1 large cauliflower (840g), cut into florets

½ tbsp smoked paprika

2 tbsp (28g) olive oil

4 thyme sprigs

1 onion (150g), chopped

1 celery stick (25g), chopped

1 garlic clove (4g), minced

3 cups (800 ml) chicken stock

1/2 cups (100ml) heavy cream

Grated parmesan cheese for serving


  1. Preheat the oven to 430°F (220°C).
  2. Cut the cauliflower into florets and coat in 1 tablespoon of olive oil.
  3. Put the florets on a pan and evenly sprinkle on salt and smoked paprika. Roast in the oven for 15 minutes until golden. 
  4. Take out a large pot - or saucepan - and put it over medium heat. Pour in a tablespoon of olive oil, and add in the chopped onion and celery. Cook for about 5 minutes until the vegetables are soft.  
  5. Add in the minced garlic and thyme and cook for about 1 minute until fragrant. 
  6. Add the majority of the roasted cauliflower to the pot (save some to top off the soup). Pour in chicken stock and bring to a simmer - cook for 10 minutes.
  7. Transfer everything to a blender or food processor, and blend until a smooth, creamy consistency forms. Add the heavy cream and blend.
  8. Pour the soup into bowls and top with grated cheese, roasted cauliflower, and a drizzle of olive oil. 


The scale up function does not change the gram measurements.


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