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Keto Soups

Low Carb Cauliflower Leek Soup

This creamy cauliflower leek soup is a staple in my keto kitchen, offering rich flavor without the carbs. When I'm craving something warm and satisfying, this recipe delivers with tender leeks, garlic, and an optional swirl of heavy cream. It’s proof that low carb eating can be deeply comforting and perfect for chilly evenings.

15 min Prep time 55 min Cook time 70 min Total time 4 Servings 350 Calories
Low Carb Cauliflower Leek Soup

Ingredients

  • tablespoons olive oil
  • tablespoons butter
  • leeks, cut into 1 inch pieces
  • large head cauliflower, chopped
  • cloves garlic, finely chopped
  • cups vegetable broth
  • salt and freshly ground black pepper to taste
  • cup heavy cream (optional)

Instructions

  1. Step 1

    Start by heating the olive oil and butter in a large pot over medium heat. Once the butter is melted, toss in the sliced leeks, cauliflower florets, and minced garlic. Sauté for about 10 minutes, stirring occasionally, until the leeks soften and the garlic becomes fragrant. Pour in the vegetable broth and bring everything to a rolling boil. Reduce the heat to low, cover the pot, and let it simmer gently for 45 minutes. The vegetables should become very tender. Remove the pot from the heat and use an immersion blender to purée the soup until silky smooth. For an extra touch of richness, stir in the heavy cream and blend again. Season generously with salt and freshly ground black pepper. I love to garnish each bowl with a swirl of cream and some fresh chives. The aroma while it simmers is incredible, filling the kitchen with a cozy, savory scent. If you don't have an immersion blender, you can carefully transfer the soup in batches to a countertop blender and purée until smooth, then return to the pot.

Chef's Tip

I always roast the cauliflower first for a deeper flavor, and I strain the soup through a fine-mesh sieve after blending. These two steps transform a simple soup into something truly special, with zero added carbs. The roasting adds a hint of caramelization, and straining ensures a velvety texture you'll love.

Storage Tips

Store leftovers in an airtight container in the fridge for up to 4 days. Reheat gently on the stovetop or in the microwave, thinning with a splash of broth if needed. The flavors meld even more overnight, making it a great make-ahead meal.

Variation Tips

For a dairy-free version, use coconut cream instead of heavy cream and olive oil in place of butter. Pair the soup with a crisp green salad and keto-friendly garlic bread. You can also add a handful of fresh spinach or kale during the last few minutes of simmering for extra nutrients and color.

Frequently Asked Questions