There are nights when pizza sounds perfect, but making dough, waiting for it to rise, and cleaning up afterward just feels like too much work. That is where this keto pizza casserole comes in. It has the familiar flavors of pizza—savory meat, tomato sauce, Italian seasoning, pepperoni, and plenty of melted cheese—without a traditional crust.

I made this recipe after wanting something warm and cheesy that could go straight from the oven to the dinner table. The best part was how easy it was to adjust with whatever was already in the fridge.

This is an easy keto pizza casserole for busy weeknights, family dinners, or meal prep. It is also flexible enough to make with ground beef, cauliflower, or cottage cheese.

Let’s get everything layered and into the oven.

What Makes This Keto Pizza Casserole So Good?

The secret is the balance between rich meat, tangy tomato sauce, melted cheese, and classic pizza seasonings. Ground beef gives the casserole a hearty base, while mozzarella creates those stretchy, golden patches everyone looks for.

Pepperoni adds a little salty, smoky flavor. A small amount of cream cheese or cottage cheese can make the center softer and creamier without making the casserole feel heavy.

Unlike a traditional pizza, everything cooks together. The result is closer to a cheesy baked pizza skillet, but with enough structure to scoop onto a plate.

Ingredients

Main Ingredients

• 1 pound ground beef
• 1 cup low-sugar or keto-friendly pizza sauce
• 1 cup shredded mozzarella cheese
• ½ cup shredded cheddar cheese
• ½ cup cottage cheese
• 3 ounces sliced pepperoni
• 2 cloves garlic, minced
• ½ small onion, finely diced
• 1 teaspoon Italian seasoning
• ½ teaspoon dried oregano
• ¼ teaspoon black pepper
• ¼ teaspoon red pepper flakes, optional
• 1 tablespoon olive oil, if needed

Ingredient Notes

Use a pizza sauce with little or no added sugar. Regular sauces can contain more carbohydrates than expected, so checking the label is useful when keeping the meal low carb.

For cheese, freshly shredded mozzarella melts especially well. Pre-shredded cheese is convenient, though it may not melt quite as smoothly.

Cottage cheese is optional, but it adds moisture and a creamy texture. Full-fat cottage cheese works particularly well in this casserole.

Optional Add-ins

This recipe is easy to customize. Try sliced mushrooms, chopped bell peppers, black olives, spinach, jalapeños, or cooked Italian sausage.

For extra heat, add more red pepper flakes. If you are cooking for children, leave them out and let everyone add hot sauce to their own serving.

For Serving

Top each portion with chopped parsley, extra Parmesan, red pepper flakes, or a few fresh basil leaves.

A simple green salad makes a nice side because its fresh crunch balances the warm, cheesy casserole.

Best Cheese for Keto Pizza Casserole

Mozzarella is the main cheese I would use because it melts smoothly and gives the casserole that classic pizza texture.

Cheddar brings a sharper flavor, so combining the two gives you more depth than mozzarella alone. Parmesan can also be sprinkled over the top during the final few minutes of baking for a slightly crispier finish.

How to Make Keto Pizza Casserole

Step 1: Cook the Beef

Preheat your oven to 375°F (190°C).

Heat a large skillet over medium heat. Add the ground beef and onion. Cook for about 6–8 minutes, breaking the meat apart as it browns.

Add the garlic, Italian seasoning, oregano, and black pepper. Cook for another minute.

Drain excess grease if necessary.

Step 2: Add the Sauce and Cottage Cheese

Reduce the heat and stir in the pizza sauce.

Fold in the cottage cheese until it is evenly distributed. It does not need to disappear completely; small creamy pockets are actually quite nice once baked.

Taste the mixture and add red pepper flakes if you want more heat.

Step 3: Layer the Casserole

Transfer the beef mixture to a lightly greased baking dish.

Spread it evenly, then arrange the pepperoni over the top. Sprinkle the mozzarella and cheddar over everything.

Try to cover most of the surface with cheese. Those little browned edges are one of the best parts after baking.

Step 4: Bake and Serve

Bake uncovered for 18–22 minutes, or until the cheese is fully melted and bubbling around the edges.

For a more golden top, switch the oven to broil for about 1–2 minutes. Watch it closely because the cheese can brown quickly.

Let the casserole rest for about 5 minutes before serving.

Personal Observation

One thing I noticed while making this casserole is that letting it rest before scooping really matters. Straight from the oven, the sauce is extremely hot and loose. After a few minutes, everything settles and the slices of pepperoni stay in place better. I also prefer spreading the cheese all the way to the edges of the dish. Those browned corners cook a little faster and give each serving a tasty crisp spot.

My Pro Tips & Kitchen Notes

• Drain excess beef grease. Too much fat can make the casserole oily instead of creamy. Drain only the excess so the meat still stays flavorful.
• Use a thick pizza sauce. A watery sauce can make the casserole loose. A thicker sauce gives you a better scoopable texture.
• Do not overload the vegetables. Extra vegetables are fine, but too many watery ingredients can release moisture during baking.
• Shred cheese yourself when possible. Freshly shredded cheese usually melts more evenly.
• Let it rest before serving. Five minutes gives the sauce time to settle and makes each portion easier to serve.

Make Ahead Tips

You can assemble the casserole several hours ahead and keep it covered in the refrigerator until you are ready to bake.

If baking directly from the refrigerator, it may need a few extra minutes in the oven. Make sure the center is hot before serving.

For meal prep, divide cooled portions into airtight containers and refrigerate.

Alternative Cooking Methods

• Skillet method: Cook everything in an oven-safe skillet, add the cheese on top, and finish in the oven. This saves you from washing another baking dish.
• Cauliflower version: Add cooked, well-drained cauliflower rice to make a keto pizza casserole with cauliflower. Press out excess moisture before mixing it in.
• Ground beef version: The recipe already works well with ground beef, but you can replace half of it with cooked Italian sausage for a stronger pizza-shop flavor.

A traditional crust is not needed, but if you want a pizza casserole with crust, you can place a prepared low-carb crust layer underneath the filling and adjust the baking time according to the crust instructions.

Recipe Variations

• Spicy: Add jalapeños, crushed red pepper, or spicy Italian sausage.
• Creamy: Increase the cottage cheese slightly or add a few tablespoons of softened cream cheese.
• Vegetable-loaded: Add mushrooms, zucchini, spinach, or bell peppers.
• Extra meaty: Use a mixture of ground beef and Italian sausage.
• Kid-friendly: Keep the seasoning mild and let kids choose their own toppings.

Ingredient Swaps

Ground beef → Ground turkey or Italian sausage

Cottage cheese → Ricotta or cream cheese

Mozzarella → Provolone or Monterey Jack

Cheddar → Colby Jack

Pizza sauce → Low-sugar marinara sauce

Pepperoni → Cooked bacon or sliced sausage

Fresh vegetables → Frozen vegetables, provided they are thawed and drained well

Common Mistakes to Avoid

Using watery sauce: It can make the casserole soupy. Choose a thicker sauce.

Adding wet vegetables: Mushrooms and frozen vegetables release water. Cook or drain them first.

Skipping the resting time: The casserole may fall apart when served immediately. Give it a few minutes to settle.

Over-broiling the cheese: The topping can go from golden to burnt quickly, so stay nearby during broiling.

What to Serve With Keto Pizza Casserole

Keep the sides simple. A crisp green salad with cucumber and a light dressing works well.

Roasted broccoli, zucchini, or green beans are also good choices for a low-carb dinner.

For drinks, sparkling water with lemon or unsweetened iced tea keeps the meal refreshing without adding much sweetness.

Storage & Freezing Tips

Store leftovers in a covered container in the refrigerator for 3–4 days.

Reheat individual portions in the microwave until hot, or warm them in a covered oven-safe dish at 350°F until heated through.

The casserole can also be frozen in individual portions. Cool it completely before freezing and use freezer-safe containers. Thaw overnight in the refrigerator before reheating for the best texture.

Frequently Asked Questions

Cook’s Tip

Do not rush the browning step. Let the ground beef cook long enough to develop some color before adding the sauce. That extra few minutes gives the finished casserole a deeper, more savory flavor.

Conclusion

This keto pizza casserole brings together the best parts of pizza in an easy baked dinner. You get seasoned ground beef, tangy sauce, pepperoni, cottage cheese, and plenty of bubbling mozzarella without having to make traditional pizza dough.

It is especially useful on busy evenings when you want something filling but do not want a complicated recipe. You can also change the toppings depending on what is in your refrigerator.

Make it spicy, load it with vegetables, or keep it simple with beef and cheese. Either way, give the casserole a few minutes to rest after baking. That small step makes serving much easier and gives the flavors a chance to settle.

Keto Pizza Casserole

A cheesy, hearty keto pizza casserole made with seasoned ground beef, pepperoni, low-sugar pizza sauce, cottage cheese, mozzarella, and cheddar. It delivers classic pizza flavor without a traditional crust and is easy enough for a weeknight dinner.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 22 minutes mins

Total Time 37 minutes mins

Course dinner, main course

Cuisine American

Servings 6

Calories 430 kcal

Equipment

• Large skillet
• 9×13 inch baking dish
• Cutting board
• Chef’s knife
• Measuring cups and spoons
• Wooden spoon or spatula
• Cheese grater

Ingredients

  

• 1 lb ground beef
• 1 cup low-sugar or keto-friendly pizza sauce
• 1 cup shredded mozzarella cheese
• ½ cup shredded cheddar cheese
• ½ cup full-fat cottage cheese
• 3 oz sliced pepperoni
• 2 cloves garlic minced
• ½ small onion finely diced
• 1 tsp Italian seasoning
• ½ tsp dried oregano
• ¼ tsp black pepper
• ¼ tsp red pepper flakes optional
• 1 tbsp olive oil if needed

Instructions

 

• Preheat the oven to 375°F (190°C).

  Heat a large skillet over medium heat. Add the ground beef and diced onion. Cook for 6–8 minutes, breaking the beef into small pieces as it browns.

  Add the minced garlic, Italian seasoning, oregano, and black pepper. Cook for 1 minute, then drain excess grease if needed.

  Reduce the heat and stir in the keto-friendly pizza sauce and cottage cheese until well combined.

  Transfer the mixture to a lightly greased 9×13-inch baking dish and spread it evenly.

  Arrange the pepperoni over the top.

  Sprinkle the mozzarella and cheddar evenly over the casserole.

  Bake uncovered for 18–22 minutes, until the cheese is melted, bubbling, and lightly golden.

  For a more browned cheese topping, broil for 1–2 minutes, watching carefully.

  Let the casserole rest for about 5 minutes before serving. Garnish with fresh parsley, basil, or red pepper flakes if desired.

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