Cheese and Spinach Cauliflower Casserole

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A creamy, cheesy cauliflower casserole with fresh spinach, perfect as a comforting keto-friendly side or main. This american-inspired keto (keto, low carb) ready in about 45 minutes pairs chopped fresh spinach, softened cream cheese, heavy cream for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 280 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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.

Prep: 15 min Cook: 30 min Serves 6 American cuisine 280 cal/serving
Plan a meal with the AI → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F. Steam 5 cups cauliflower florets until tender, about 8-10 minutes, then mash coarsely with 2 tbsp butter.
  2. Step 2: In a mixing bowl, combine the mashed cauliflower, 3 cups chopped fresh spinach, 6 oz softened cream cheese, 1/2 cup heavy cream, 1 tsp garlic powder, 1 tsp salt, and 1/2 tsp black pepper. Mix until smooth.
  3. Step 3: Stir in 1 cup shredded cheddar cheese until evenly distributed.
  4. Step 4: Transfer the mixture to a greased 9x9-inch baking dish and top with remaining 1/2 cup shredded cheddar and 1/4 cup grated parmesan cheese.
  5. Step 5: Bake uncovered for 20-25 minutes, until the top is golden and bubbly. Let rest 5 minutes before serving.

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Bakeware & baking tools → Shop all kitchen tools →

Frequently asked questions

How long does Cheese and Spinach Cauliflower Casserole take to make?

Total time is about 45 minutes (15 min prep + 30 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 Cheese and Spinach Cauliflower Casserole?

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 chopped fresh spinach from drying out.

Can I substitute ingredients in Cheese and Spinach Cauliflower Casserole?

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 Cheese and Spinach Cauliflower Casserole for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). 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 Cheese and Spinach Cauliflower Casserole keto?

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

Related recipes