Keto Pizza Casserole


5 from 116 votes
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This keto pizza casserole has all the best parts of a pizza all baked together, creating the ultimate low carb comfort food! Cheesy, meaty, and made with 5 ingredients, it takes just 20 minutes to make!

keto pizza casserole

This may surprise some, but we order a fair share of pizza delivery in my house. Of course, even when I’m eating keto, that doesn’t mean I want to forgo one of our favorite weekend treats.

Que, keto pizza, pizza bowls, and, more recently, keto pizza casserole. Rather than piling our toppings on a keto pizza crust, everything’s layered on a bed of low-carb pasta and baked until the cheese is bubbly and golden brown. 

It’s one of my favorite dishes to make when we’re hosting since it’s full of delicious flavors everyone will love, yet it’s deceptively low in carbs. 

Table of Contents
  1. Recipe highlights
  2. Ingredients needed
  3. How to make a keto pizza casserole
  4. Recipe tips and variations
  5. How to store leftovers
  6. Frequently asked questions
  7. More keto casserole recipes to try
  8. Keto Pizza Casserole (Recipe Card)

Recipe highlights

  • No cauliflower needed. As much as I love cauliflower pizza crust, sometimes, I need a break from cauliflower. 
  • Easy to customize. I give you the base recipe, but you can get creative and layer on your favorite pizza toppings, just like traditional pizza. 
  • Always a crowd pleaser. Adults and kids alike always RAVE when I make this pizza casserole. Even your friends who aren’t on a keto diet will beg you for the recipe, I guarantee it. 

Ready in 30 minutes. Like crustless pizza and chicken crust pizza, this casserole makes for an easy and fast weeknight dinner.

Ingredients needed

If you’ve made any of my other keto dinner recipes before, you’ve probably already got everything on hand to make this one. If not, you can find them all at your local grocery store. Here is what you’ll need:

  • Keto pasta I used gluten-free rotini pasta, which holds sauce and cheese so much better than other kinds of pasta. Any kind of keto pasta works, even homemade almond flour pasta
  • Onion and garlic- Add extra flavor to the sauce mixture. 
  • Ground sausage- A must for any good pizza-inspired dish. You can use any ground beef or pork if you can’t find ground sausage. 
  • Pizza sauce- Homemade keto pizza sauce, not any of the store-bought ones that are full of sugar and unnecessary carbs! You can also use pomodoro sauce or sugo, two homemade Italian tomato sauces with very few carbs.
  • Parmesan and mozzarella cheese- A combination of both kinds of cheese yields stretchy and melted cheese. 
  • Pepperoni- Simple and classic pizza topping. 

How to make a keto pizza casserole

I’ve included step-by-step photos below to make this recipe easy to follow at home. For the full printable recipe instructions and ingredient quantities, scroll to the recipe card at the bottom of this post.

Step 1- Cook the pasta. Start by cooking the pasta as per the package directions until al dente. Drain it and set it aside.

Step 2- Making the filling. Next, add some olive oil to a large pot or saucepan and place it over medium heat. Once hot, add the onion and garlic and cook until fragrant. Add the ground sausage and cook until no longer brown. Add the pizza sauce and simmer for 4-5 minutes. Remove the sauce mixture from the heat and stir through the cooked pasta, along with the parmesan cheese. 

Step 3- Bake the casserole. Now, transfer the pasta into a greased 8 x 13-inch baking dish. Sprinkle the remaining parmesan cheese, then the mozzarella cheese. Place the pepperoni on top and bake for 20-25 minutes or until the cheese has melted. Remove the casserole from the oven, cut it into pieces, and serve immediately.

how to make a keto pizza casserole

Serving suggestions

While this dish is delicious on its own, there are tons of low carb side dishes that work well with it. Some classic options include keto garlic bread, keto cheese bread, and keto bread varieties (like keto rolls and keto buns).

Try a keto potato salad, cauliflower potato salad, or coleslaw for some greens or vegetables.

Recipe tips and variations

  • Lower the carbs. Use half the pasta and double up on the sauce.
  • Add more protein. For a heartier casserole, add shredded chicken, bacon, or diced ham. 
  • Add more low-carb veggies. Like sliced green bell peppers, mushrooms, diced tomatoes, black olives, or spinach. 
  • Garnish. I like to add a little fresh basil for a bright flavor and pop of color. 
  • Make it spicy. If you can handle the heat, add a few dashes of red pepper flakes to the sauce. 
  • Make a creamy red sauce. When I really want to go the extra mile, I’ll fold in ½ cup of cream cheese for a more decadent sauce.

How to store leftovers

To store: Leftovers can be stored in the refrigerator, covered, for up to five days.

To freeze: Place the cooked and cooled casserole in a large container and store it in the freezer for up to 6 months.

Reheating: Either microwave portions for 30-40 seconds until hot or in a preheated oven.

Make ahead tip

If you’d like to make this casserole in advance, it can be prepped, stored, and covered in the fridge for up to 3 days. When you’re ready to bake, let it sit at room temperature for 15 minutes, then bake as directed. 

low carb pizza casserole

Frequently asked questions

How many carbs are in pizza casserole?

There are just 3 grams of net carbs in a serving of this pizza casserole.

Can I make this vegetarian?

For a vegetarian option, switch out the ground sausage for a vegetarian-based sausage, like Beyond Meat crumbles.

More keto casserole recipes to try

keto pizza casserole recipe.

Keto Pizza Casserole

5 from 116 votes
This keto pizza casserole has all the best parts of a pizza all baked together, creating the ultimate low carb comfort food! Cheesy, meaty, and made with 5 ingredients, it takes just 20 minutes to make!
Servings: 8 servings
Prep: 10 minutes
Cook: 20 minutes
Total: 30 minutes


  • 16 ounces keto pasta * See notes
  • 1 tablespoon olive oil
  • 1 large onion
  • 2 cloves garlic
  • 1 pound ground sausage can use any ground meat of choice
  • 1 cup keto pizza sauce ** See notes
  • 1/2 cup parmesan cheese divided
  • 1 cup mozzarella cheese
  • 1/4 cup pepperoni


  • Preheat the oven to 180C/350F. Grease a 9 x 13-inch baking dish and set aside.
  • Prepare the pasta as per the directions. Once al dente, remove from the heat and drain. Set aside.
  • In a deep pot or large saucepan, add the olive oil and place over medium heat. Once hot, add the onion and garlic and cook for 1-2 minutes, until fragrant. Add the ground sausage, break apart in the pan, and cook until browned. Add the pizza sauce and mix well. Let the mixture simmer for 4-5 minutes. Remove from the heat.
  • Add the cooked pasta into the sausage sauce mixture and mix until combined. Fold through half the parmesan cheese. Transfer the mixture into the greased baking dish. Sprinkle with remaining parmesan cheese, mozzarella cheese, then top with pepperoni. Place the dish in the oven and bake for 20 minutes, or until the cheese has melted and the edges are golden.
  • Remove the casserole from the oven, before slicing and serving.


* Any keto pasta that cooks like traditional pasta can be used.
** If you’d like a thinner sauce, you can make a keto spaghetti sauce
TO STORE: Pizza casserole can be stored in the refrigerator, covered, for up to 1 week.
TO FREEZE: Place leftover casserole in a shallow container and store it in the freezer for up to 6 months. 
REHEATING: Either microwave portions of the casserole for 1-2 minutes or place it in a preheated oven and bake at 180C/350F for 8-10 minutes until the cheese is bubbling. 


Serving: 1servingCalories: 281kcalCarbohydrates: 18gProtein: 25gFat: 23gSodium: 612mgPotassium: 198mgFiber: 13gVitamin A: 186IUVitamin C: 2mgCalcium: 156mgIron: 1mgNET CARBS: 5g
Course: Main Course
Cuisine: American
Author: Arman Liew
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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