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Keto Cauliflower Pizza Casserole (The BEST Recipe!)

A beautiful serving of homemade, cheesy Keto Cauliflower Pizza Casserole being served for a family dinner.

A low-carb and keto-friendly recipe for a ‘Cauliflower Pizza Casserole.’ This dish captures the flavors of a supreme pizza without the crust. It features a base of finely chopped cauliflower, which is layered in a baking dish with sautéed mushrooms, diced bell peppers, a low-carb marinara sauce, pepperoni, and a generous blend of mozzarella and Parmesan cheeses. The casserole is then baked until it is hot, bubbly, and the cheese on top is melted.

Ingredients

  • 4 cups cauliflower florets
  • 1 Tablespoon avocado oil
  • 8 ounces sliced mushrooms
  • 1 medium bell pepper, diced
  • 1/2 teaspoon dried basil
  • 1/2 teaspoon dried oregano
  • 1/4 teaspoon dried thyme
  • 1/4 teaspoon dried rosemary
  • 1 teaspoon salt
  • 1 1/2 cups low-carb marinara sauce
  • 2-3 ounces uncured pepperoni
  • 2 cups shredded mozzarella cheese
  • 1/3 cup grated Parmesan cheese
  • Fresh basil, for garnish (optional)

Instructions

  1. Preheat the oven to 400°F. Grease a medium casserole dish.
  2. Finely chop the cauliflower florets until they resemble cauliflower rice. Place them in a microwave-safe dish with about an inch of water and microwave for 90 seconds to par-cook. Drain well and pat dry.
  3. Heat the avocado oil in a pan and sauté the mushrooms for 5-7 minutes until softened.
  4. In a bowl, combine the par-cooked cauliflower, sautéed mushrooms, diced bell pepper, and all the dried seasonings (basil, oregano, thyme, rosemary, salt).
  5. Assemble the Casserole: Spread a thin layer of the marinara sauce on the bottom of the baking dish.
  6. Add half of the cauliflower mixture in an even layer. Top with another layer of sauce, half of the pepperoni, and half of the mozzarella cheese.
  7. Add the remaining cauliflower mixture, followed by the remaining sauce, remaining pepperoni, and remaining mozzarella.
  8. Sprinkle the Parmesan cheese on top.
  9. Bake for 30 minutes, until the casserole is bubbly and the cheese is melted.
  10. Let it cool for a few minutes, then serve garnished with fresh basil.

Notes

  • This is a great low-carb and keto-friendly alternative to traditional pizza, using cauliflower as the base instead of a dough crust.
  • Par-cooking the cauliflower and sautéing the mushrooms before baking are key steps to ensure the final casserole is not watery.
  • Be sure to use a low-carb or no-sugar-added marinara sauce to keep the dish keto-friendly.