Keto Cauliflower and Vegetable Soup

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

A velvety, low-carb soup packed with cauliflower, broccoli, and Parmesan, simmered to silky perfection. This american-inspired slow cooker (keto) ready in about 265 minutes pairs chicken broth, cauliflower, broccoli for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 220 calories and feeds 4, 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.

★ 4.1 (13 ratings) Prep: 10 min Cook: 255 min Serves 4 American cuisine 220 cal/serving
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Ingredients

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Instructions

  1. Step 1: Combine 1.5 cups chicken broth, 1 cup chopped cauliflower, 1 cup chopped broccoli, 1/2 cup chopped zucchini, 1/2 cup chopped onion, and 2 minced garlic cloves in the slow cooker. Stir to combine.
  2. Step 2: Add 1/2 tsp dried basil, 1/4 tsp salt, and 1/8 tsp black pepper. Cook on low for 4 hours until vegetables are very tender.
  3. Step 3: Stir in 1/4 cup heavy cream and 1/4 cup grated Parmesan cheese until melted and soup is creamy (15 minutes).

Frequently asked questions

How long does Keto Cauliflower and Vegetable Soup take to make?

Total time is about 265 minutes (10 min prep + 255 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 Keto Cauliflower and Vegetable 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 chicken broth from drying out.

Can I substitute ingredients in Keto Cauliflower and Vegetable 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 Keto Cauliflower and Vegetable Soup for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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 Keto Cauliflower and Vegetable Soup keto?

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

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