Roasted Cauliflower & Leek Soup

This cauliflower leek soup is easy to make, but you'd never guess it from the taste - roasting & blending the veggies makes it flavorful & satisfying.

Roasted Cauliflower & Leek Soup

Thank you all SO much for your ideas & suggestions of what to make with my giant cauliflower. You had so many creative ideas, and I just loved reading through them all.

Last night, we curled up on the sofa with this creamy roasted cauliflower & leek soup. (Note: I used cashews for the cream part – if you’re nut-free, check out this creamy vegan cauliflower soup recipe.) This process might look subtle, but roasting the cauliflower, leeks & garlic brings out some pretty big flavors… and in a surprisingly little amount of time. The short version of this recipe is this: Roast. Blend.

(But I promise, it tastes fancier than that).

Roasted Cauliflower Leek Soup

Thanks to so many of you for commenting with the leek & cauliflower soup idea… I went with this cashew cream idea suggested by Alisa. With the “toss it all in the oven” method (and paprika addition) as suggested by Anouk.


4.9 from 26 reviews

Roasted Cauliflower & Leek Soup

 
This creamy vegan cauliflower leek soup is a breeze to make - just roast & blend! I love it with a hunk of crusty bread on the side.
Author:
Recipe type: Soup
Serves: 3 as a main, 4-5 as a starter or side
Ingredients
  • About 2 cups chopped cauliflower
  • 2-3 leeks, white and very light green parts, chopped (about 1 to 1½ cups)
  • 2 garlic cloves
  • Extra-virgin olive oil, for drizzling
  • ½ cup raw, unsalted, un-roasted cashews, soaked overnight* (see note)
  • 1½ teaspoons miso paste (or just salt if you don't have any)
  • Leaves from a few sprigs of marjoram or thyme
  • 3 cups water
  • 2 tablespoons more olive oil (to blend into the soup)
  • ⅛ teaspoon smoked paprika (or more to taste)
  • Squeeze of lemon
  • Sea salt and fresh black pepper
  • Red pepper flakes (optional)
  • Splash of white wine vinegar or champagne vinegar, at the end (especially if you made yours too spicy like I did)
Instructions
  1. Preheat the oven to 400 degrees. Spread the cauliflower, leeks, and garlic on a baking sheet. Drizzle with olive oil and sprinkle with a few pinches of salt & pepper. Roast for 20-30 minutes, rotating halfway through. Remove when everything is starting to turn golden, but before the leeks are burning (if a few get too charred, it's ok, just pick them out later).
  2. Add to your blender the veggies you just roasted, drained cashews, marjoram leaves, miso paste, a squeeze of lemon and 1½ cups water. Blend until pureed. Add the 2 tablespoons olive oil, paprika, and the remaining 1½ cups water. Blend again. Taste and adjust seasonings.
  3. Pour into a medium saucepan and heat just until the soup is warm. Stir in a little more water if it's too thick. Serve with bread on the side.
Notes
*Be sure to use plain raw cashews or your soup will taste too much like cashews. If you're using a high speed blended (vitamix or blendtec), you could get away with soaking your cashews for less time because the blender will liquify everything thoroughly anyway.

 

99 comments

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Rate this recipe (after making it):  

  1. Keshia
    02.02.2015

    I absolutely love this recipe and have made it twice in the last two weeks. I was wondering if you have the nutrional info for the soup? It would be really awesome if you started posting them with your recipes!

  2. Mandy D from mandyshealthylife.com
    01.10.2015

    Hey!

    I made this soup and it was the bomb diggity! Thanks so much for the awesome recipes!!! My husband is loving all the new food from your site.

    Mandy

    • jeanine
      01.11.2015

      thanks Mandy, I’m so glad you liked this and the other recipes! – let me know some of your favorites?

  3. Michele'sInTheKitchen
    11.07.2014

    Beautiful recipe! I’m all over it. Think it’s okay/better if I use Dutch Oven to roast in? Thanks so much! Dinner is solved for tonight! Thank you!

  4. Julie
    07.17.2014

    Can’t wait to try this recipe for dinner tomorrow! I couldn’t find unroasted cashews though so I bought roasted. Do I need to change anything before making?

  5. nicole
    08.14.2013

    Have you tried to freeze this soup? I bought all the ingredients, but am not going to have space in our week to eat it 😉

    • jeanine
      08.14.2013

      I haven’t… I think it would work but the texture might become less creamy after you thaw it (I’ve had that happen with similar soups). I’ll sometimes blend it again before I’m ready to eat so it’s super creamy again.

      If you try freezing this, let me know how it works out!

  6. Heather from snacktive.blogspot.com
    03.29.2013

    I had my parents over for dinner and cooked for them for the first time. I made this soup and we all loved it! It tasted so creamy and decadent. I brought leftovers to work today and am about to enjoy it again!

  7. Tia
    03.21.2013

    I cant get to the store and I’m missing the Magorame, Thyme & white wine vinegar. Any substitudes? I really want to make this since I’m lil under the weather. Thanks

  8. Danielle
    03.05.2013

    Yum! I love mixing up a variety of roasted vegetables for soup. So creamy with such depth of flavor! I’m so glad I found this soup, completely delicious! I added a little bit of brown butter and seared scallops to the top and it was so rich and wonderful!

    • jeanine
      03.05.2013

      oh I bet scallops would be so delicious, glad you liked it!

  9. This is a great recipe. I like how you combined roasted leeks with the cauliflower and also used miso for an Asian touch. This inspired me to make something similar–a roasted cauliflower and leek soup with a broth similar to what you get in Tom Kha Gai soup (coconut, ginger and lime). I topped it with bacon crumbles, chopped peanuts and cilantro.

  10. Annie from phoo-d.com
    02.11.2013

    I happened to have all the ingredients on hand (including cashews soaking in the fridge!) so I made this tonight. It was terrific and even our 2 year old loved it. I’m glad I doubled the quantity! You have a beautiful site.

  11. Theresa
    02.10.2013

    So excited to have recently discovered your site! We made this soup last night and it is so delicious. Thanks for sharing!

    Theresa

  12. Cauliflower is one of my favorite veggies; seriously. This soup looks so silky and I love the use of cashews .

  13. Hi Jeanine, I just discovered your lovely blog and it’s fantastic! I really like adding raw nuts to soups to make them creamy without the use of dairy. I just posted a broccoli basil soup made with walnuts that is really yummy. Thanks for all the goodness you share!

  14. Christina
    01.24.2013

    Made this soup tonight and it was absolutely delicious! Soups like this have always intimidated me, but it was so easy and took no time to make. My boyfriend feel in love with it and my mom loved that I used cashews to make the creamy texture (she’s been telling to me for months that I should go gluten & dairy free for the health benefits). Anyways, thank you for the amazing recipe! Like you, I got a HUGEmongous cauliflower from Whole Foods. I’ve been thinking about giving FarmHouse a try though, seeing that we live in Austin as well!!

  15. looks amazing – making an inspired version tonight!

  16. Good gracious your soups are amazing. Inspiring. After the roaring success of your sundried tomato soup, I am definitely making this tonight. And thank you for helping my resolution of going vegan for the month of January be delicious, warming and comforting.

  17. Liz B
    01.16.2013

    Darn it! I almost bought cauliflower and leeks at the fruit shop today, but opted out – silly me!

    This looks like what I wish I was having for dinner tonight!

  18. This looks great. I love cashews instead of the cream making it vegan. Also seems like such a good pairing with the cauliflower. Really would bring out the nuttiness.

A food blog with fresh, zesty recipes.
Photograph of Jeanine Donofrio and Jack Mathews in their kitchen

Hello, we're Jeanine and Jack.

We love to eat, travel, cook, and eat some more! We create & photograph vegetarian recipes from our home in Chicago, while our shiba pups eat the kale stems that fall on the kitchen floor.