This creamy roasted cauliflower and leek soup combines the earthy sweetness of roasted cauliflower with the mild onion flavor of leeks.
Roasting the cauliflower develops a nutty depth while sautéing the leeks with garlic and thyme adds aromatic notes.
Blending the soup creates a luscious texture that’s perfect for a comforting starter or light meal.
Why You’ll Love This Recipe
- Roasting cauliflower caramelizes its natural sugars, enhancing the soup’s flavor.
- Sautéing leeks with garlic and thyme infuses the soup base with subtle savory notes.
- Finishing the soup with a blend of broth and a splash of cream delivers a smooth, rich texture without heaviness.
Creamy Roasted Cauliflower and Leek Soup
A velvety soup blending roasted cauliflower and sautéed leeks with garlic and thyme for a comforting and flavorful dish.
- Prep time
- 15 minutes
- Cook time
- 40 minutes
- Servings
- 4
- Yield
- About 4 cups soup
Ingredients
- 1 medium head cauliflower (about 1.5 pounds), cut into florets
- 2 tablespoons olive oil, divided
- 2 medium leeks, white and light green parts only, sliced and thoroughly rinsed
- 2 cloves garlic, minced
- 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried)
- 4 cups low-sodium vegetable broth (960 ml)
- 1/4 cup heavy cream (60 ml)
- Salt and freshly ground black pepper to taste
Instructions
- Roast the Cauliflower Preheat your oven to 425°F (220°C). Toss the cauliflower florets with 1 tablespoon olive oil and a pinch of salt on a baking sheet. Roast for 25 minutes, turning once halfway, until golden brown and tender.
- Sauté the Leeks and Garlic While the cauliflower roasts, heat 1 tablespoon olive oil in a large pot over medium heat. Add the sliced leeks and cook for 5 minutes until softened. Stir in the minced garlic and thyme, cooking for another minute until fragrant.
- Combine and Simmer Add the roasted cauliflower to the pot with the leeks. Pour in the vegetable broth and bring the mixture to a boil. Reduce heat and simmer for 10 minutes to meld the flavors.
- Blend the Soup Carefully transfer the soup in batches to a blender or use an immersion blender to puree until smooth and creamy. Return to the pot if using a blender.
- Finish and Season Stir in the heavy cream and season with salt and black pepper to taste. Warm gently—do not boil—then serve hot.
Helpful Tips
- Be sure to wash leeks thoroughly as dirt can get trapped between layers.
- Use a blender in small batches to avoid splattering hot soup.
- If you prefer a dairy-free version, substitute heavy cream with coconut milk or omit entirely.
Storage and Make-Ahead
Cool the soup within two hours of cooking to prevent bacterial growth.
Store in an airtight container in the refrigerator for up to 3 days.
Reheat gently on the stove until steaming hot, at least 165°F (74°C).
Do not freeze after adding cream, as texture may change.
Frequently Asked Questions
Can I make this soup vegan?
Yes, substitute the heavy cream with full-fat coconut milk or another plant-based cream alternative.
How do I properly clean leeks?
Slice the leeks and rinse them thoroughly under running water, separating the layers to remove any trapped dirt or grit.
Can I prepare the soup ahead of time?
Yes, this soup can be made a day in advance and reheated gently before serving.
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