Cauliflower Pizza Casserole is a cheesy, easy vegetarian dish for dinner that you can fill with all your favourite pizza toppings!

Overhead shot of cauliflower pizza casserole in a glass baking dish.

Is it just me, or is anything smothered in cheese pretty much perfect? You know I am all for healthy, clean meals that are delicious, but sometimes your love for cheese wins a bit, am I right? Not to worry, you can have your pizza and eat it too without any guilt because this cauliflower pizza casserole is filled with delicious creamy cauliflower, pizza sauce, meaty mushrooms and topped with melty bubbly cheese.

Dinner, anyone?

Close up of cauliflower pizza casserole in a glass baking dish.

This casserole came together pretty easy, and for anyone wondering about the cauliflower taste, cauliflower is one of my favourite meat substitutes. Being vegetarian doesn’t mean you don’t want something hearty to eat, and vegetables like cauliflower are perfect for that. It gets soft and creamy but maintains a texture that makes this casserole not only delicious, but very filling. Even better, the addition of mushrooms takes it over the top leaving you with a casserole that could easily replace Friday night pizza once in a while.

While I thought this cauliflower pizza casserole tasted delicious fresh, reheated it seemed that the flavours melded together even better and tastes so great – kind of like leftover pizza that’s heated back up. While it seemed pretty easier to cream the cauliflower, I really wanted the vegetable to shine through, and it really does in this dish. I honestly think this is a great dish to get someone who is on the edge about cauliflower over on the right side! Okay, so I’m totally a cauliflower cheerleading, but you will definitely love this dish! And let’s not forget, melty, bubbly, golden brown cheese.

Need I say more?

Top down shot of casserole in a glass baking dish.
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Cheesy casserole in a glass dish.

Cheesy Cauliflower Pizza Casserole

 Cauliflower Pizza Casserole is a cheesy, easy vegetarian dish for dinner that you can fill with all your favourite pizza toppings!
5 (from 3 ratings)


  • 1 large cauliflower, cut into florets
  • 1 tablespoon oil
  • 1 teaspoon fine sea salt
  • 1 teaspoon ground black pepper
  • 2 cups marinara sauce
  • 2 to matoes, 1 diced, 1 in sliced
  • 1/2 medium onion, sliced
  • 1/2 bell pepper, diced
  • 1/2 cup mushrooms, sliced
  • 2 garlic cloves, minced
  • 1 1/4 cups mozzarella, shredded
  • chopped parsley, for topping (or herb of choice) (optional)


  • Preheat oven to 425 degrees Fahrenheit. Spray a large baking sheet with non-stick spray or grease with oil.
  • Season cauliflower with 1/2 teaspoon salt and 1/2 teaspoon black pepper and roast for 20 minutes.
  • In a bowl, add the marinara sauce to the cauliflower and mix to coat. Add the rest of the ingredients, except parsley, sliced tomato and 1 cup of mozzarella cheese and stir together with a wooden spoon until add combined.
  • In a greased 8×8 baking pan, add the cauliflower mix and cover with the rest of the cheese. Top with tomato slices. Lower oven to 350 degrees Fahrenheit and bake for 25 minutes until cheese is melted and golden brown.

  • Remove from oven, top with chopped parsley and serve.


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Calories: 152kcal, Carbohydrates: 14g, Protein: 9g, Fat: 8g, Saturated Fat: 3g, Cholesterol: 18mg, Sodium: 994mg, Potassium: 732mg, Fiber: 4g, Sugar: 8g, Vitamin A: 1163IU, Vitamin C: 71mg, Calcium: 158mg, Iron: 2mg

Disclaimer: Although attempts to provide accurate nutritional information, kindly note that these are only estimates. Nutritional information may be affected based on the product type, the brand that was purchased, and in other unforeseeable ways. will not be held liable for any loss or damage resulting for your reliance on nutritional information. If you need to follow a specific caloric regimen, please consult your doctor first.