Creamy Roasted Cauliflower Soup

Discover the ultimate cauliflower soup recipe that promises a luxurious, creamy texture without any heavy cream. This delightful dish elevates simple ingredients through roasting, transforming the cauliflower into a deeply flavorful base. You will enjoy a rich, satisfying, and incredibly healthy soup perfect for any meal. Get ready to create a comforting bowl that everyone will love!

Why You’ll Love This Cauliflower Soup

This roasted vegetable soup offers so much to adore, especially for busy parents and beginners in the kitchen.

  • Achieve an incredibly luxurious creaminess in your cauliflower soup naturally. Roasting and blending make it thick and smooth, without adding dairy cream.
  • Savor the deep, complex flavors that only roasted cauliflower can bring to a soup. The caramelization adds a wonderful sweetness and depth.
  • Prepare this satisfying soup with surprisingly few, simple ingredients. You likely have most of them in your pantry already.
  • This versatile soup perfectly complements various meals, from light lunches to hearty dinners. It’s a wonderful side or main course.
  • Benefit from easy make-ahead and freezing options, making meal prep a breeze. Enjoy delicious soup whenever you want it.
  • Easily adapt this recipe for gluten-free and vegan diets, ensuring everyone can enjoy a warm, comforting bowl.

Ingredients for Creamy Cauliflower Soup

Crafting this delicious cauliflower soup requires just a handful of fresh ingredients. These simple components work together to create a robust and creamy flavor profile.

  • Cauliflower: 1 large head (about 2 pounds), cut into bite-size florets. Cauliflower is a nutrient-dense vegetable known for its various health benefits. For more information on its advantages, see this article on the nutritional benefits of cauliflower.
  • Extra-virgin olive oil: 3 tablespoons, divided for roasting and sautéing.
  • Fine sea salt: To taste, for seasoning throughout.
  • Red onion: 1 medium, chopped for aromatic depth.
  • Garlic: 2 cloves, pressed or minced.
  • Vegetable broth: 4 cups (32 ounces).
  • Unsalted butter: 2 tablespoons, for added richness and smoothness.
  • Fresh lemon juice: 1 tablespoon, or more if needed, brightens all the flavors.
  • Ground nutmeg: Scant ¼ teaspoon, adds a subtle warmth.
  • For garnish: 2 tablespoons finely chopped fresh flat-leaf parsley, chives, and/or green onions.

Notes & Substitutions

  • Dairy-Free/Vegan: Use 1/4 cup raw cashews (soaked in hot water for 30 minutes, then drained) instead of butter.
  • Onion: Yellow onion works perfectly if you don’t have red on hand.
  • Broth: Chicken broth can be substituted for vegetable broth for a different flavor profile.
  • Nutmeg: You can substitute with a pinch of curry powder for an interesting twist.

Essential Equipment

You only need a few common kitchen tools to create this fantastic cauliflower soup. Gather these items before you begin cooking.

  • Large, rimmed baking sheet.
  • Parchment paper (optional, for easy cleanup).
  • Dutch oven or large soup pot.
  • High-speed blender (or an immersion blender for direct blending).

How to Make Roasted Cauliflower Soup (Step-by-Step)

Follow these simple steps to create a wonderfully flavorful and creamy cauliflower soup. Each stage is designed for ease and delicious results.

  1. Roast cauliflower: Preheat your oven to 425 degrees Fahrenheit. If desired, line a large, rimmed baking sheet with parchment paper for easy cleanup. On the baking sheet, toss the cauliflower florets with 2 tablespoons of olive oil until lightly and evenly coated. Arrange the cauliflower in a single layer and sprinkle lightly with salt. Bake until the cauliflower is tender and caramelized on the edges, 25 to 35 minutes, tossing halfway through for even cooking.
  2. Sauté aromatics: While the cauliflower roasts, warm the remaining 1 tablespoon of olive oil in a Dutch oven or soup pot over medium heat until shimmering. Add the chopped red onion and ¼ teaspoon salt. Cook, stirring occasionally, until the onion is softened and turning translucent, about 5 to 7 minutes.
  3. Add garlic and broth: Stir in the minced garlic and cook, stirring constantly, until fragrant, about 30 seconds. Be careful not to burn it. Then, pour in the 4 cups of vegetable broth, scraping up any browned bits from the bottom of the pot.
  4. Simmer soup base: Reserve 4 of the prettiest roasted cauliflower florets for garnish later. Transfer the remaining roasted cauliflower to the pot with the broth and onions. Increase the heat to medium-high and bring the mixture to a simmer. Reduce the heat as necessary to maintain a gentle simmer. Cook, stirring occasionally, for 20 minutes; this allows all the wonderful flavors to meld together beautifully.
  5. Blend for creaminess: Once the soup finishes simmering, remove the pot from the heat and let it cool for a few minutes. Carefully transfer the hot cauliflower soup to a high-speed blender, working in batches if necessary. Never fill the blender past its maximum fill line to prevent overflow. Add the unsalted butter to the blender with the soup. Blend until absolutely smooth and creamy.
  6. Season and adjust: Add the fresh lemon juice and ground nutmeg to the blended soup and blend again to combine. Taste the soup and adjust the seasoning as needed. You will likely add another ¼ to ¾ teaspoon of salt, depending on your vegetable broth’s sodium content. A little more lemon juice can also add extra brightness. Blend again briefly after any adjustments.
  7. Serve and garnish: Ladle the warm roasted cauliflower soup into individual bowls. Top each serving with one of the reserved roasted cauliflower florets and a sprinkle of fresh chopped parsley, green onion, or chives. Enjoy your comforting, homemade soup immediately.

Pro Tips for the Best Cauliflower Soup

Achieve an unforgettable roasted cauliflower soup with these simple, expert recommendations.

  • Ensure your cauliflower is deeply caramelized, not just softened, during roasting. This develops maximum flavor and sweetness.
  • Blend the soup in batches if using a standard blender to prevent spills and achieve the smoothest texture.
  • Don’t skip on tasting and adjusting the salt and lemon; they are crucial for balancing all the flavors.
  • Always use a good quality vegetable broth; it forms the foundation of your soup’s overall taste.
  • Avoid overcooking the cauliflower before roasting, as this can lead to a mushy texture later.

Serving Suggestions, Storage, and Variations

This creamy cauliflower soup is incredibly versatile, making it perfect for various occasions.

  • Serving: Serve this delightful soup with crusty bread for dipping, homemade toasted croutons for crunch, or alongside a fresh green salad for a complete meal. It also pairs wonderfully with a grilled cheese sandwich.
  • Storage: For optimal freshness and to prevent foodborne illness, it’s important to follow proper food safety tips for storing soup. Store leftover soup in an airtight container in the refrigerator for up to 4 days. For longer storage, freeze the soup for several months. Thaw overnight in the fridge and reheat gently on the stovetop.
  • Flavor Variations:
    • Add a pinch of smoked paprika or cumin to the aromatics for a warm, earthy flavor.
    • Stir in a parmesan rind while the soup simmers for an extra layer of savory depth, removing it before blending.
    • Top with crispy roasted chickpeas or crumbled bacon for added texture and protein.

Nutrition Information

Enjoy this delicious and wholesome cauliflower soup, knowing it’s packed with goodness. Below is an estimated nutritional breakdown for one serving, based on the recipe’s ingredients.

NutrientAmount
Serving Size1 bowl
Calories227 calories
Sugar Content7.7 g
Sodium Content1043.7 mg
Fat Content17 g
Saturated Fat5.4 g
Trans Fat0 g
Carbohydrate18.1 g
Fiber Content5.3 g
Protein Content5 g
Cholesterol15.3 mg

Please note these values are estimates and can vary based on specific brands and ingredient preparation. For personalized dietary advice, always consult a qualified nutritionist.

Frequently Asked Questions (FAQ)

Here are answers to some common questions about making this fantastic cauliflower soup.

  • Can I roast the onion and garlic with the cauliflower? Yes, you can. Toss them with the cauliflower on the baking sheet for a deeper, more mellow flavor.
  • How do I adjust the soup’s thickness? For a thinner soup, add a little extra broth or water while blending. To thicken it, simmer longer to reduce, or add a small cooked potato before blending.
  • Can this soup be made ahead of time? Absolutely! This soup is perfect for meal prepping and often tastes even better the next day as the flavors meld.
  • Is it truly creamy without any heavy cream? Yes, roasting the cauliflower and then blending it creates a naturally thick and incredibly smooth, creamy texture. The butter adds richness, not thickness.
  • Can I use frozen cauliflower for this recipe? You can, but fresh cauliflower is highly recommended for the best roasting results and flavor development in this creamy soup. If using frozen, roast it directly from frozen, but expect slightly less caramelization.

Conclusion

Embrace the comforting simplicity of this rich cauliflower soup, a testament to how simple ingredients can create extraordinary flavor. Its creamy texture and deep roasted notes make it perfect for cozy meals, easy meal prep, and satisfying weeknight dinners. Give this recipe a try and discover your new favorite way to enjoy vegetables. We hope you love making and sharing this wholesome soup as much as we do!

Close-up of creamy cauliflower soup with roasted cauliflower garnish and fresh herbs.

Creamy Roasted Cauliflower Soup

This velvety, comforting soup features tender, caramelized roasted cauliflower blended with aromatic onion, garlic, and vegetable broth, finished with a touch of butter, lemon, and nutmeg. It's a perfect meal for a cozy evening.
Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Servings: 4 servings
Calories: 300

Ingredients
  

Main Ingredients
  • 1 large head (about 2 pounds) cauliflower cut into bite-size florets
  • 3 tablespoons extra-virgin olive oil divided
  • Fine fine sea salt
  • 1 medium red onion chopped
  • 2 cloves garlic pressed or minced
  • 4 cups (32 ounces) vegetable broth
  • 2 tablespoons unsalted butter
  • 1 tablespoon fresh lemon juice or more if needed
  • Scant ¼ teaspoon ground nutmeg
For Garnish
  • 2 tablespoons fresh flat-leaf parsley, chives and/or green onions finely chopped

Equipment

  • Oven
  • Baking Sheet
  • Dutch Oven or Soup Pot
  • Blender

Method
 

Preparation
  1. Preheat oven to 425°F and line a baking sheet with parchment paper if desired.
Roast Cauliflower
  1. Toss cauliflower florets with 2 tablespoons olive oil and salt on the baking sheet. Bake for 25-35 minutes until tender and caramelized, tossing halfway.
Sauté Aromatics
  1. While cauliflower bakes, warm remaining 1 tablespoon olive oil in a Dutch oven over medium heat. Add chopped onion and ¼ teaspoon salt, cooking until softened and translucent (5-7 minutes).
Add Broth & Simmer
  1. Stir in garlic for 30 seconds until fragrant, then add the vegetable broth.
  2. Reserve 4 roasted cauliflower florets for garnish, then add the rest to the pot. Bring to a gentle simmer over medium-high heat, then reduce heat and cook for 20 minutes, stirring occasionally.
Blend Soup
  1. Remove soup from heat, let cool slightly, then carefully transfer to a blender, working in batches.
  2. Add butter and blend until smooth. Incorporate lemon juice, nutmeg, and additional salt to taste, blending again until well combined.
Serve & Store
  1. Serve individual bowls of soup garnished with a reserved roasted cauliflower floret and chopped fresh herbs.

Notes

This soup stores well in the refrigerator for up to four days, or in the freezer for several months. Ensure proper salting for optimal flavor and adjust lemon juice for extra zing.

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