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Cauliflower Leek Soup

Jessica T. Brown
A creamy, plant-powered soup that’s dairy-free, fiber-rich, and heart-healthy. Quick to make, deeply satisfying, and perfect for everyday cooking or meal prep.
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Course Dinner, Soup
Cuisine American
Servings 4

Equipment

  • 1 6-Quart Dutch Oven
  • 1 Wooden Spoon
  • 1 Blender or (1) Immersion Blender
  • 1 Chef’s Knife
  • 1 Cutting Board

Ingredients
  

  • 2 tablespoons olive oil or vegan butter
  • 2 –3 medium leeks white and light green sections only, rinsed, halved lengthwise, and thinly sliced
  • 3 –4 cloves garlic finely minced
  • 5 cups cauliflower florets about 1 medium 2 lb head
  • 4 cups Yukon Gold or Russet potatoes peeled and diced into 1-inch cubes (about 2 medium potatoes)
  • 4 cups vegetable broth Better Than Bouillon recommended
  • 2 teaspoons fresh thyme or 1 teaspoon dried thyme
  • Salt and freshly ground black pepper to taste
  • Optional garnishes: chopped fresh chives plant-based shredded cheese, or crunchy croutons

Instructions
 

  • Sauté the Leeks: Warm the olive oil or vegan butter in a large, heavy-bottomed pot over medium heat. Add the sliced leeks and cook for about 5 minutes, stirring occasionally, until they soften and turn lightly golden.
  • Build the Flavor Base: Stir in the minced garlic, cauliflower florets, diced potatoes, and thyme. Allow everything to cook together for another 3 minutes, releasing the aromas and slightly toasting the garlic.
  • Simmer the Vegetables: Pour in the vegetable broth, scraping the bottom of the pot to loosen any caramelized bits. Bring the mixture to a gentle boil, then reduce the heat to a simmer. Cook uncovered for 18–20 minutes, or until the cauliflower and potatoes are tender when pierced with a fork.
  • Blend to Creamy Perfection: Remove the pot from the heat and let it cool slightly for safety. Using either a countertop blender (working in batches) or an immersion blender directly in the pot, puree the soup until it reaches a smooth, velvety consistency.
  • Adjust and Serve: Return the blended soup to the pot if needed, reheat gently over medium-low heat, and season with salt and pepper to your liking. Ladle into bowls and garnish with fresh chives, shredded plant-based cheese, or croutons before serving.

Notes

  • Leek Prep Tip: Leeks can trap dirt between their layers. Slice them first, then rinse thoroughly in a bowl of water to remove grit.
  • Texture Control: For a chunkier soup, blend only half the mixture and combine it with the unblended portion.
  • Storage: Keeps well in an airtight container in the refrigerator for up to 4 days or freeze for up to 2 months. Reheat gently to preserve the creamy texture.
  • Flavor Boost: For a richer taste, add a splash of unsweetened plant-based cream before blending.
  • Meal Prep Friendly: This soup thickens slightly as it cools, making it perfect for packing into lunch containers.