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Roasted Garlic Cauliflower Soup

Roasted Garlic Cauliflower Soup

  • Author: Chef Resha
  • Total Time: 55 minutes
  • Yield: 2 servings


We roast the garlic and cauliflower together to deepen their flavors, then puree into a silky and rich soup. Topped with crispy fried crimini mushrooms, chives, and fresh thyme. Drizzle with basil oil if you want.



For the soup

  • 1 head of cauliflower, broken apart and sliced
  • 7 large cloves of garlic, peeled
  • 2 cups low-sodium chicken broth
  • 1/4 cup half and half
  • 1 teaspoon fresh thyme, chopped
  • 1/2 teaspoon fresh rosemary, chopped
  • 2 tablespoons fresh chives, finely chopped
  • Olive oil for drizzling
  • Kosher salt and black pepper, to taste
  • Basil oil, to garnish (optional)

For the fried mushrooms

  • 1 cup crimini mushrooms, thinly sliced
  • 2 tablespoons cornstarch
  • Vegetable oil for frying
  • Fine sea salt, to taste


  1. Preheat oven to 425 degrees F.
  2. Break off the stems from the cauliflower head. With a very sharp knife, gently cut large floret chunks from the core. Slice the floret chunks thinly. You will have some pieces that break off into smaller tiny floret heads and that’s totally fine. Lay the cauliflower and whole garlic cloves onto a large sheet pan and drizzle with enough olive oil to thinly coat each piece. It shouldn’t be swimming in oil, but no pieces should be dry. Sprinkle a generous pinch of flaky kosher salt and black pepper all over the cauliflower. It’s important you season it really well at this stage. Make sure the cauliflower and garlic is in an even layer and that each piece is touching the bottom of the sheet pan. They shouldn’t be laying on top of each other.
  3. Roast the cauliflower and garlic for 30 minutes. You’ll know its ready when it’s tender and golden brown around the edges, and the smaller bits are dark and caramelized. Remove from oven and let cool for 10 minutes.
  4. Scoop all of the roasted garlic and cauliflower into your blender (SEE NOTE), along with 1/2 cup of the 2 cups of chicken stock. Blend to break it down on the lowest setting, then add the remaining chicken stock in stages while increasing the speed/power of the blender. Keep doing this until you reach a creamy, but not too thick/gloopy consistency. You don’t want this soup to be water-thin, but it shouldn’t be mashed-potato-thick either. It should be velvety and coat your spoon.
  5. When the soup is perfect in consistency, transfer it to a medium saucepan over medium heat and bring to a simmer. Reduce heat to medium-low and add the fresh thyme and rosemary, and a pinch of black pepper. Continue to heat the soup through for about 10 minutes over medium-low heat. Add the half and half, is using, and stir to combine. Continue simmering for another 3 to 5 minutes. Taste and adjust seasoning if necessary.
  6. Meanwhile, place the sliced mushrooms in a bowl, and toss with the cornstarch. Make sure it’s evenly coated.
  7. In a small pot, pour in about 1-inch of vegetable oil. Bring the oil to a temperature of 375-385 degrees F. When the oil reaches temperature, gently fry some of the mushrooms (not all) for about 3 minutes, or until the sizzle of the oil settles down. This happens when the water in the mushrooms evaporates. Drain on paper towels and season with a pinch of fine sea salt as soon as they’re out of the oil. Continue frying the mushrooms in batches until done.
  8. Pour your soup into bowls, and top with the fried mushrooms, and fresh chives. Add a small drizzle of basil oil or plain extra virgin olive oil, and serve immediately. Enjoy.


If you don’t have a high powered blender, you can use a hand-held blender or food processor instead.

This recipe can be doubled to serve four people.

  • Prep Time: 10
  • Cook Time: 45
  • Category: soups and stews

Keywords: soup, cauliflower soup, roasted cauliflower soup, meals for 2

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