Creamy Cauliflower & Cheddar Soup

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Velvety soup made with roasted cauliflower and sharp cheddar, thickened naturally without flour for a satisfying keto meal. This american-inspired keto (low carb) ready in about 40 minutes pairs cauliflower, chopped onion, unsalted butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 2, so it slots cleanly into a low-carb week and pairs well with cauliflower rice or roasted green vegetables. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 4.4 (11 ratings) Prep: 15 min Cook: 25 min Serves 2 American cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 400°F. Toss 2 cups chopped cauliflower with 1/2 tsp olive oil, spread on a baking sheet, and roast for 20 minutes until golden edges form.
  2. Step 2: Melt 1 tbsp butter in a pot over medium heat, add 1/4 cup chopped onion and 1/4 cup diced celery, and sauté for 5 minutes until softened and fragrant.
  3. Step 3: Add roasted cauliflower and 1.5 cups chicken broth, simmer for 10 minutes, then blend until smooth with an immersion blender. Stir in 1/2 cup shredded cheddar and 1/4 cup heavy cream, cooking for 3 more minutes until melted and hot.

Frequently asked questions

How long does Creamy Cauliflower & Cheddar Soup take to make?

Total time is about 40 minutes (15 min prep + 25 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Creamy Cauliflower & Cheddar Soup?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep cauliflower from drying out.

Can I substitute ingredients in Creamy Cauliflower & Cheddar Soup?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Creamy Cauliflower & Cheddar Soup for a different number of people?

The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Creamy Cauliflower & Cheddar Soup low carb?

Yes — this recipe is tagged low carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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