Cheesy Cauliflower Breakfast Casserole with Bacon and Spinach

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

A hearty keto breakfast casserole packed with cauliflower, crispy bacon, spinach, and melted cheddar cheese. This american-inspired keto (keto, low carb) ready in about 45 minutes combines chopped small cauliflower florets, cooked and crumbled bacon, chopped fresh spinach into a breakfast that fuels the morning without the midday crash — make-ahead-friendly and balanced enough to anchor the first meal of the day. Each serving lands at about 280 calories and feeds 6, so it sits comfortably in a weekly breakfast rotation alongside fruit, yogurt, or coffee. 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
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Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F (190°C). Lightly grease a 9x9-inch baking dish.
  2. Step 2: Steam 4 cups chopped cauliflower florets until tender, about 6-8 minutes, then drain well and pat dry to remove excess moisture.
  3. Step 3: In a large bowl, whisk together 6 large eggs, 1/2 cup heavy cream, 1 tsp salt, 1/4 tsp black pepper, and 1/2 tsp onion powder until smooth.
  4. Step 4: Stir in steamed cauliflower, 6 slices cooked and crumbled bacon, 2 cups chopped fresh spinach, and 1 cup shredded sharp cheddar cheese until evenly combined.
  5. Step 5: Pour the mixture into the prepared baking dish and smooth the top. Sprinkle remaining 1/4 tsp black pepper over the casserole.
  6. Step 6: Bake in the preheated oven for 25-30 minutes until the casserole is set, golden on top, and a knife inserted in the center comes out clean. Let cool for 5 minutes before slicing and serving.

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Frequently asked questions

How long does Cheesy Cauliflower Breakfast Casserole with Bacon and Spinach take to make?

Total time is about 45 minutes (15 min prep + 30 min cook). Most home cooks find this fits comfortably into a busy morning; prep components the night before to save active time.

How do I store leftover Cheesy Cauliflower Breakfast Casserole with Bacon and Spinach?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat in the microwave or oven; egg- or grain-based items may need a splash of milk or water to refresh texture. Cold-served items (overnight oats, smoothies) keep 2–3 days in the fridge.

Can I substitute ingredients in Cheesy Cauliflower Breakfast Casserole with Bacon and Spinach?

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 Cheesy Cauliflower Breakfast Casserole with Bacon and Spinach 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 Cheesy Cauliflower Breakfast Casserole with Bacon and Spinach keto?

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