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Creamy Roasted Cauliflower Soup

Creamy roasted cauliflower soup turns caramelized, golden cauliflower into a silky ivory puree with an immersion blender. Roasting first deepens the flavor, then simmering and blending creates a velvety, completely smooth texture.
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Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Dinner
Cuisine: American
Calories: 230
Ingredients Equipment Method Notes

Ingredients
  

Cauliflower
  • 1 cauliflower Cut into florets.
Olive oil
  • 3 tbsp olive oil Divided; use 2 tbsp for roasting and the rest for sautéing.
Onion
  • 1 onion Chopped.
Garlic
  • 3 garlic cloves
Vegetable broth
  • 4 cup vegetable broth
Heavy cream
  • 1 2 tbsp heavy cream About 1/2 cup; stir in at the end.

Equipment

  • 1 sheet pan
  • 1 large pot

Method
 

Roast the cauliflower
  1. Preheat oven to 425°F (220°C). Visual cue: the oven indicator reaches the set temperature before you start roasting.
  2. Toss cauliflower florets with 2 tbsp olive oil and spread on a sheet pan in a single layer. Visual cue: florets look evenly coated and there’s minimal crowding.
  3. Roast for 25-30 minutes, until deeply golden and caramelized at the edges. Visual cue: browned spots and a deep ivory-gold color appear on the cauliflower edges.
Build the soup
  1. Heat the remaining 1 tbsp olive oil in a large pot over medium heat. Visual cue: oil shimmers but does not smoke.
  2. Add the onion and sauté until soft. Visual cue: onion turns translucent and smells sweet, about 5-7 minutes.
  3. Add garlic and cook until fragrant, about 30-60 seconds. Visual cue: garlic aroma becomes noticeable without browning.
  4. Add roasted cauliflower and vegetable broth, then bring to a simmer for 10 minutes. Visual cue: small bubbles gently break the surface around the pot edges.
Blend and finish
  1. Blend the soup until completely smooth using an immersion blender. Visual cue: no visible cauliflower flecks remain and the texture looks creamy and uniform.
  2. Stir in heavy cream and season with salt to taste. Visual cue: soup looks slightly lighter and glossy after the cream is incorporated.

Notes

For maximum flavor, roast until deeply golden—those browned, caramelized edges drive the taste. Blend thoroughly for the silkiest, restaurant-style texture. Refrigerate leftovers in a covered container for up to 4 days; rewarm gently on the stove, adding a splash of broth if needed. Freezing: no, the cream can break and the texture may become grainy after thawing. For a dairy-free option, use full-fat coconut milk instead of heavy cream.