Roasted Cauliflower Soup

  • Author: Erin Alderson
  • Prep Time: 10 mins
  • Cook Time: 30 mins
  • Total Time: 40 minutes
  • Yield: 2 servings 1x
  • Category: soup
  • Method: stovetop
  • Cuisine: international


An easy roasted cauliflower soup that comes together quick and can easily be vegan by leaving out the heavy cream.



  • 4 cups cauliflower florets
  • 2 tablespoons olive oil, divided
  • 1/4 teaspoon sea salt, plus more to taste if desired
  • 1/2 medium yellow onion, minced
  • 2 cloves garlic, minced
  • 1 teaspoon dried thyme
  • 1 1/2 cup low-sodium vegetable broth
  • 1 to 2 cups water (see note)
  • 1/2 cup heavy cream, optional
  • Toasted breadcrumbs, for topping
  • Hot sauce, for topping


  1. Preheat oven to 425˚ F. Toss cauliflower florets with 1 tablespoon olive oil and salt. Place on a baking tray in a single layer. Roast, stirring once halfway through, until cauliflower is caramelized, 25 to 30 minutes.
  2. While cauliflower is roasting, heat a medium stock pot over medium-low heat. Add olive oil followed by the minced onion. Cook until onion is fragrant and translucent, 5 to 6 minutes. Add in the garlic and thyme, cooking for one minute more.
  3. Add in the vegetable broth and water, bring to a boil, reduce to a simmer, and let simmer until the cauliflower has finished roasting. Set aside a few small pieces of cauliflower for topping. Place the broth mixture and cauliflower in a blender and puree until smooth. If a perfectly smooth consistency is desired, pour the soup mixture through a sieve while transferring back to the pot.
  4. Once the soup is back in the pot, measure in the heavy cream and heat over low until ready to serve. Divide the soup into two bowls and top with breadcrumbs, leftover cauliflower, and hot sauce (if desired).


Recipe Notes

Tips & Tricks: I find using only vegetable broth overpowers the flavors soup, so part broth and part water. Of course, you can replace all the water with vegetable broth if desired.

The soup is creamy without the heavy cream if you would like to leave it vegan. However, the heavy cream adds a nice layer of richness that I wouldn’t miss. Use cashew cream, sunflower cream, or a non-dairy creamer.



  • Calories: 294 kcal

Keywords: cauliflower soup, roasted cauliflower soup