This easy keto low carb pizza casserole recipe requires just 5 ingredients. Find out how to make a delicious cauliflower pizza casserole – no crust needed!

we absolutely love pizza night. In fact, we have it for dinner in some form almost every week! For a no crust pizza option, my absolute favorite is this easy keto low carb pizza casserole recipe.

If you’re more into a traditional everything pizza, you might prefer my crustless pizza recipe in a cast iron skillet – it uses sausage and veggies as the base instead of the cauliflower you’ll find in this pizza casserole.

Some people might say that crustless pizza casserole isn’t really pizza. That may be true, but you still get all the flavors you love about it. Sometimes that’s more than enough for me, especially when I’m in a hurry.

Either way, low carb casseroles are among the most common dishes I make for dinner. Making a meal is so much faster and easier when you only have to make one thing! Low carb pizza casserole is one of my favorites. If you’re looking for other options, try chicken cordon bleu casserole, chicken bacon ranch casserole or pesto chicken casserole.

Of course, this isn’t to say that keto pizza casserole actually replaces real pizza for us all the time. When we really want a true pizza – with the crust and everything – the coconut flour version of the fathead pizza recipe is our absolute favorite. We alternate that one with a cauliflower pizza crust and a paleo pizza crust, though admittedly we usually top it with cheese, despite the crust being paleo,


As much as we love a real pizza with crust, a low carb pizza casserole is much quicker to make. That’s one of the reasons it’s a staple weeknight dinner at our house. With a no crust pizza casserole, there is no kneading dough or rolling it out!

You need just ten minutes of prep time to throw together an easy keto pizza casserole. It doesn’t get much faster than that. You can even assemble it in advance to save more time.

If you want to make the cauliflower pizza casserole ahead, you can put most of it together early. Even a few days before is fine. Simply complete the first three steps and place in the fridge. When you are ready to eat, just heat in the oven until it’s hot and the cheese melts.

Another option would be to freeze the casserole and bake straight from the freezer. This method would take longer, but allows for more long term storage. It will last at least a few months frozen without a problem.


I used cauliflower in this keto pizza casserole recipe, for its neutral flavor. Since this is essentially a crustless pizza, I wanted something that “feels” starchy (but actually is not) to make up for no crust. As always, cauliflower was perfect!

Is there anything cauliflower can’t do? I’ve used it in the past for all kinds of starch replacements. It works well in so many things, from cauliflower mac and cheese to cauliflower potato salad.

With all that cauliflower in there, a low carb pizza casserole is a great way to get your family to eat their veggies. And, other veggies would also work! Feel free to swap the cauliflower with any others you like.

If you usually like veggie toppings on your pizza, throw those either on top or inside, too. I usually stick with simply the cauliflower, which makes for an easy way to incorporate vegetables. It’s another reason for me to occasionally choose a cauliflower pizza casserole over a pizza with crust.


This easy keto low carb pizza casserole recipe requires just 5 ingredients. Find out how to make a delicious cauliflower pizza casserole – no crust needed ! Course Main Course Cuisine  American Calories 238kca lPrep Time 10 minutes Cook Time 40 minutes Total Time 50 minutes


  • 1 large head Cauliflower (cut into small florets)
  • 2 tbspOlive oil
  • Sea salt
  • Black pepper
  • 1 1/2 cupMarinara sauce
  • 2 cup Mozzarella cheese (shredded)
  • 2 oz Pepperoni slices
  • 2 tspItalian seasoning (optional)


  1. Preheat the oven to 425 degrees F (218 degrees C).
  2. In a 9×13 in (23×33 cm) glass casserole dish, toss the cauliflower with olive oil, sea salt, and black pepper. Arrange evenly in a single layer and roast in the oven for about 25 minutes, until a little golden. If you want the cauliflower browned more evenly, you can toss halfway through. (Leave oven preheated after – you will need to use it again.)
  3. Pour the marinara sauce evenly over the cauliflower. Sprinkle with shredded cheese, then top with Italian seasoning (if using). Place pepperoni slices over the cheese.
  4. Place the casserole back in the oven for about 10 minutes, until the cheese is melted and golden.

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