Creamy Cauliflower Broccoli Soup

Featured in: Simple One-Pot Cozy Meals

This comforting bowl brings together tender cauliflower and broccoli florets simmered with aromatic vegetables and herbs until perfectly soft. The mixture is blended into a silky smooth consistency with a touch of milk for creaminess. Golden homemade croutons seasoned with garlic add the perfect crunchy contrast to each spoonful.

The preparation comes together in just 45 minutes, making it ideal for weeknight dinners or meal prep. The soup naturally leans vegetarian and can be adapted for vegan diets with plant-based milk.

Seasoned with dried thyme and oregano, the flavors develop beautifully during simmering. A splash of cream or dollop of sour cream can be stirred in for extra richness if desired.

Updated on Tue, 27 Jan 2026 14:59:00 GMT
Creamy Cauliflower and Broccoli Soup garnished with golden, crunchy croutons and fresh parsley in a cozy bowl. Pin It
Creamy Cauliflower and Broccoli Soup garnished with golden, crunchy croutons and fresh parsley in a cozy bowl. | hazelflint.com

There's something magical about the moment when a pot of humble vegetables transforms into something silky and warming. I discovered this soup on a gray afternoon when my farmer's market haul seemed almost too green, too much broccoli and cauliflower staring back at me. My mother had always made vegetable soups taste thin and forgettable, but then I learned the secret: blend them. That single decision changed everything, turning ordinary into extraordinary.

My neighbor knocked on the door one October evening with a bag of vegetables from her garden, asking if I could help her use them up. We stood in my kitchen chopping and chatting, and by the time the blender hummed to life, the entire house smelled like autumn itself. She had a bowl that night and came back three days later asking for the recipe, which is how I know this one truly works.

Ingredients

  • Cauliflower and broccoli florets: These two are the soul of the soup, offering natural sweetness and body when blended together, creating that luxurious texture without cream.
  • Onion, celery, and carrots: This trio is your flavor foundation, building depth and richness through slow sautéing before anything else joins the pot.
  • Garlic cloves: Just enough to whisper into the background, not shout, so mince them fine and watch for that brief moment when they turn golden and fragrant.
  • Vegetable broth: Use the best quality you can find, as it's doing most of the flavor work here without dairy.
  • Milk or plant-based milk: This is what transforms the blended vegetables into something silk-like and elegant, added at the very end.
  • Olive oil: Two tablespoons for sautéing the vegetables, keeping everything light but flavorful.
  • Dried thyme and oregano: These herbs tie everything together with an almost Mediterranean whisper, but don't skip the drying step as fresh versions can turn bitter.
  • Bread for croutons: Use something sturdy with real texture, never soft sandwich bread, because you want them to stay crispy and golden.

Instructions

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Get your croutons going:
Start your oven early so the croutons bake while you prep everything else. Toss those bread cubes with olive oil, garlic powder, and salt, then spread them on a baking sheet and let them turn golden and crispy for 10 to 12 minutes, stirring halfway through.
Build your flavor base:
Heat olive oil in a large pot over medium heat, then add your diced onion, celery, and carrots. Let them soften for about 5 minutes, stirring occasionally so nothing sticks, until they're tender and starting to turn translucent.
Wake up the aromatics:
Add your minced garlic along with the thyme and oregano, stirring constantly for just about a minute until the kitchen fills with that herbaceous smell that tells you everything's working.
Add the green vegetables:
Stir in your cauliflower and broccoli florets, letting them coat in the oil and herbs for 2 to 3 minutes. This short time helps them start releasing their flavors before the liquid arrives.
Simmer until tender:
Pour in your vegetable broth and bring everything to a boil, then lower the heat and cover the pot. Let it simmer gently for 15 to 20 minutes until the vegetables are so tender they practically fall apart when you touch them with a spoon.
Blend until creamy:
Remove from heat and let cool just slightly, then use an immersion blender to blend the soup until it's completely smooth and velvety. If using a stand blender, work in batches and be careful with the hot liquid.
Finish with milk and seasoning:
Stir in your milk and taste as you go, adding salt and black pepper until it tastes like something you'd actually want to eat. Gently reheat over low heat if it's cooled too much, but don't let it boil.
Serve with all the toppings:
Ladle the soup into bowls and crown each one with those golden croutons, a sprinkle of fresh parsley, and a little grated cheese if you're feeling fancy.
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A steaming bowl of Cauliflower and Broccoli Soup topped with croutons, served alongside crusty bread for dipping. Pin It
A steaming bowl of Cauliflower and Broccoli Soup topped with croutons, served alongside crusty bread for dipping. | hazelflint.com

I made this soup for my son's school fundraiser, and three parents asked for the recipe before the pot was even empty. There was something about serving it in small cups with the croutons on the side that made it feel special and restaurant-like, turning a simple vegetable soup into something people remembered.

The Magic of Texture

The first time someone told me that texture matters more than I thought, I was making a bland vegetable soup that tasted fine but felt boring. That's when I learned that the contrast between the silky soup and the crunchy croutons is what makes your mouth sing. It's the same reason a salad needs nuts or a creamy pasta needs fresh herbs on top.

Flavor Layering Secrets

I used to think herbs were just for decoration until I started sautéing them in oil before adding liquid. That single technique changes how the flavors dissolve into the soup, making them taste like they're part of the equation rather than sprinkled on afterward. The garlic, thyme, and oregano need that moment in the heat to really open up and share what they have to offer.

Making It Your Own

This soup is incredibly forgiving once you understand the basic structure, which is why I keep coming back to it. Some nights I add a pinch of nutmeg for extra warmth, other times I stir in a splash of cream for richness or even a drizzle of truffle oil if I'm feeling adventurous. The croutons are your canvas for creativity too, and once you master the basic technique, you can flavor them however your mood suggests.

  • A pinch of nutmeg adds a subtle warmth that makes people wonder what secret ingredient you used.
  • Try swapping the milk for heavy cream or even a dollop of sour cream stirred in at the end for extra richness.
  • Make the croutons ahead of time and store them in an airtight container so you always have them ready for busy weeknights.
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Vegetarian Cauliflower and Broccoli Soup blended smooth, garnished with fresh parsley and croutons, ready to serve hot. Pin It
Vegetarian Cauliflower and Broccoli Soup blended smooth, garnished with fresh parsley and croutons, ready to serve hot. | hazelflint.com

This soup has become my go-to recipe for those moments when I need to feed people something that tastes like I spent all day cooking, even when I only spent forty-five minutes. It reminds me that simple ingredients in the right order can create something truly memorable.

Recipe FAQs

Can I make this soup ahead of time?

Yes, this soup keeps well in the refrigerator for 3-4 days. Store croutons separately in an airtight container to maintain their crunch. Reheat gently on the stovetop, adding a splash of milk or broth if needed to adjust consistency.

Is this soup freezer-friendly?

The soup freezes beautifully for up to 3 months. Cool completely before transferring to freezer-safe containers. Thaw overnight in the refrigerator and reheat slowly. Croutons are best made fresh when serving.

Can I use frozen cauliflower and broccoli?

Frozen vegetables work well in this soup. Add them directly to the pot without thawing. You may need to extend the simmering time by 3-5 minutes to ensure they're completely tender before blending.

What can I use instead of bread for croutons?

Try toasted pumpkin seeds, sunflower seeds, or chopped nuts for a gluten-free crunch. Sautéed chickpeas or roasted chickpea crumbs also add excellent texture and protein.

How do I make this soup richer without dairy?

Stir in a tablespoon of tahini, coconut cream, or cashew cream after blending. These add velvety texture and subtle flavor while keeping the soup dairy-free and vegan.

Can I add protein to this soup?

White beans, lentils, or shredded chicken can be added during the last 5 minutes of simmering. For a complete meal, serve with a grilled cheese sandwich or crusty bread on the side.

Creamy Cauliflower Broccoli Soup

A velvety smooth blend of cauliflower and broccoli with aromatic herbs and golden croutons.

Prep Time
15 minutes
Cook Time
30 minutes
Overall Time
45 minutes
Recipe by Vivian Gray


Skill Level Easy

Cuisine International

Makes 4 Servings

Diet Preferences Vegetarian-Friendly

Ingredient List

Vegetables

01 1 medium head cauliflower, cut into florets
02 1 medium head broccoli, cut into florets
03 1 medium onion, diced
04 2 celery stalks, diced
05 2 medium carrots, diced
06 2 garlic cloves, minced

Liquids

01 4 cups vegetable broth
02 1 cup milk or unsweetened plant-based milk

Spices & Seasoning

01 2 tablespoons olive oil
02 1 teaspoon dried thyme
03 1/2 teaspoon dried oregano
04 Salt and freshly ground black pepper to taste

Croutons

01 2 cups cubed crusty bread
02 2 tablespoons olive oil
03 1/2 teaspoon garlic powder
04 Pinch of salt

Optional Toppings

01 2 tablespoons chopped fresh parsley
02 Grated Parmesan or vegetarian hard cheese

Directions

Step 01

Prepare croutons: Preheat oven to 375°F. Toss bread cubes with olive oil, garlic powder, and salt. Spread on a baking sheet and bake for 10 to 12 minutes until golden and crisp. Set aside.

Step 02

Sauté aromatic vegetables: In a large pot, heat olive oil over medium heat. Add onion, celery, and carrots; sauté for 5 minutes until softened.

Step 03

Bloom herbs: Add garlic, thyme, and oregano; cook for 1 minute until fragrant.

Step 04

Add cruciferous vegetables: Stir in cauliflower and broccoli florets, cook for 2 to 3 minutes.

Step 05

Simmer vegetables: Pour in vegetable broth; bring to a boil, then reduce heat and simmer covered for 15 to 20 minutes until vegetables are tender.

Step 06

Blend soup: Remove from heat. Use an immersion blender to blend soup until smooth and creamy, or blend in batches in a stand blender.

Step 07

Finish and season: Stir in milk, season with salt and pepper. Gently reheat if needed.

Step 08

Serve: Ladle soup into bowls, top with croutons, parsley, and cheese if using. Serve hot.

Necessary Tools

  • Large soup pot
  • Knife and cutting board
  • Baking sheet
  • Immersion or stand blender
  • Wooden spoon

Allergen Details

Review ingredients for allergens, and always talk to your doctor if you're unsure.
  • Contains wheat from croutons
  • Contains milk if using dairy milk or cheese
  • Use gluten-free bread for croutons to ensure gluten-free preparation
  • Use plant-based milk and omit cheese for dairy-free preparation
  • Always check ingredient labels for hidden allergens

Nutrition Details (per portion)

Use this nutrition info as a reference only. It‘s not intended as healthcare advice.
  • Calories: 240
  • Fats: 10 g
  • Carbohydrates: 30 g
  • Proteins: 8 g