Keto Low Carb Pizza Casserole

There are nights when everyone wants pizza, but you don’t necessarily want to order takeout.

That’s when this Keto Low Carb Pizza Casserole comes to the rescue.

It has everything I love about pizza—savory meat, gooey melted cheese, tangy tomato sauce, Italian seasoning, and plenty of delicious toppings—but it’s baked together in one cozy casserole instead of sitting on a traditional crust.

The result is cheesy, bubbling, hearty, and incredibly satisfying.

I first made this on a weekend when we were craving pizza but wanted something a little different.

I had ground beef in the refrigerator, some mozzarella, and a jar of low-sugar marinara in the pantry.

I browned the beef, added the sauce and seasonings, covered everything with cheese, and scattered some pepperoni over the top.

Then into the oven it went.

A few minutes later, the cheese was bubbling and golden around the edges.

The smell alone had everyone hovering around the kitchen.

When I finally served it, nobody seemed to miss the crust.

There were second helpings.

And then someone scraped the last little cheesy bits from the corner of the dish.

That’s when I knew this recipe was staying.

It’s now one of my favorite easy keto dinners when we’re craving pizza but want something hearty and low-carb.

Prep Time: 10 minutes
Cook Time: 25 minutes
Total Time: About 35 minutes
Servings: 6

Why You’ll Love This Keto Pizza Casserole

• Low-carb and keto-friendly
• All the flavors of pizza
• No traditional crust
• Cheesy and satisfying
• Easy weeknight dinner
• Family-friendly
• Great for meal prep
• Easy to customize
• One-dish comfort food

Ingredients

• 1 lb ground beef
• 1 cup low-sugar marinara or pizza sauce
• 2 cups shredded mozzarella cheese
• 1 cup sliced pepperoni
• ½ cup shredded Parmesan cheese
• 1 teaspoon Italian seasoning
• 1 teaspoon garlic powder
• ½ teaspoon onion powder
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 1 tablespoon olive oil, if needed

Optional Pizza Toppings

Customize the casserole just like you would a pizza.

Try:

• Mushrooms
• Bell peppers
• Black olives
• Jalapeños
• Italian sausage
• Bacon
• Diced ham
• Spinach
• Red onion
• Banana peppers
• Extra mozzarella

How to Make Keto Low Carb Pizza Casserole

Step 1: Preheat the Oven

Preheat your oven to 190°C (375°F).

Lightly grease a 9×13-inch baking dish.

Step 2: Brown the Beef

Heat a large skillet over medium-high heat.

Add the ground beef.

Cook for approximately 6–8 minutes, breaking it apart with a spoon, until browned and fully cooked.

Drain excess grease if necessary.

Step 3: Season the Beef

Add:

• Garlic powder
• Onion powder
• Italian seasoning
• Salt
• Black pepper

Stir well.

Let the seasonings cook with the beef for about 30 seconds.

Step 4: Add the Pizza Sauce

Pour the marinara or pizza sauce into the skillet.

Stir everything together.

Let it simmer for about 2–3 minutes.

Taste and adjust the seasoning.

Step 5: Build the Casserole

Spread the beef and sauce mixture evenly into the prepared baking dish.

Sprinkle about half of the mozzarella over the top.

Add your desired pizza toppings.

Scatter the pepperoni over everything.

Finish with the remaining mozzarella and Parmesan.

Step 6: Bake

Place the casserole in the preheated oven.

Bake uncovered for approximately 20–25 minutes, until the cheese is completely melted and bubbling.

For an extra golden top, broil for 1–2 minutes at the end.

Watch carefully because the cheese can brown quickly.

Step 7: Rest

Remove the casserole from the oven.

Let it rest for about 5–10 minutes before serving.

This gives the sauce time to settle and makes it easier to scoop.

My Best Tips

Choose a Low-Sugar Sauce

Traditional marinara can contain more carbohydrates than you might expect.

Check the label and choose a sauce that fits your keto goals.

Drain the Beef

Too much grease can make the casserole oily.

Drain the beef if needed before adding the sauce.

Don’t Overload With Wet Toppings

Fresh mushrooms, tomatoes, and other vegetables can release water during baking.

Sauté them first if they’re particularly moist.

Use Freshly Shredded Cheese

Freshly shredded mozzarella usually melts more smoothly.

Can I Use Ground Turkey?

Absolutely.

Ground turkey makes the casserole lighter while still giving you plenty of protein.

You can also use:

• Ground chicken
• Italian sausage
• Ground pork
• A combination of meats

Can I Make It Without Meat?

Yes.

For a vegetarian version, replace the beef with:

• Mushrooms
• Zucchini
• Spinach
• Bell peppers
• Cauliflower
• Black olives

Sauté the vegetables first to remove excess moisture.

What Cheese Works Best?

Mozzarella is the classic choice.

But you can add:

• Provolone
• Cheddar
• Monterey Jack
• Colby Jack
• Parmesan
• Ricotta

A little Parmesan on top gives the casserole a wonderful savory finish.

Delicious Variations

Supreme Pizza Casserole

Add mushrooms, bell peppers, olives, onions, and pepperoni.

Meat Lovers Pizza Casserole

Add pepperoni, sausage, bacon, and ham.

Buffalo Chicken Pizza Casserole

Replace the beef with shredded chicken and add buffalo sauce, mozzarella, and ranch seasoning.

White Pizza Casserole

Skip the tomato sauce and use a creamy garlic sauce with chicken, spinach, mozzarella, and Parmesan.

Jalapeño Popper Pizza Casserole

Add cream cheese, jalapeños, bacon, and mozzarella.

Hawaiian-Style

Add diced ham and a small amount of pineapple if it fits your personal carbohydrate target.

Can I Make This Keto?

Yes.

The basic ingredients are naturally low in carbohydrates, but the biggest variable is the pizza or marinara sauce.

Choose a low-carb sauce and check the labels of your pepperoni and seasonings.

Can I Make This Gluten-Free?

Yes.

The casserole itself is naturally crustless, but always check the labels on processed ingredients such as pepperoni, sauces, and seasonings.

Can I Make This Ahead?

Absolutely.

Prepare the casserole, cover it tightly, and refrigerate for up to 24 hours before baking.

If baking directly from the refrigerator, allow additional cooking time until the center is hot and bubbling.

Storage

Store leftovers in an airtight container in the refrigerator for up to 3–4 days.

How to Reheat

Reheat individual servings in the microwave.

For a crispier, cheesier top, reheat portions in the oven or air fryer.

Can I Freeze Pizza Casserole?

Yes.

Allow the casserole to cool completely.

Portion it into freezer-safe containers or freeze the whole casserole tightly wrapped.

Freeze for up to 2–3 months.

Thaw overnight in the refrigerator before reheating.

What to Serve With Keto Pizza Casserole

Because this casserole is rich and cheesy, I love serving it with something fresh.

Try:

• Caesar salad
• Italian salad
• Cucumber salad
• Roasted broccoli
• Garlic green beans
• Sautéed spinach
• Zucchini
• Roasted cauliflower

A crisp salad with a simple Italian dressing is probably my favorite pairing.

Nutritional Information

Approximate per serving:

• Calories: 470
• Protein: 32g
• Fat: 34g
• Total Carbohydrates: 7g
• Fibre: 2g
• Net Carbohydrates: 5g

Nutrition values are estimates and will vary depending on the meat, sauce, cheese, pepperoni, and toppings used.

Frequently Asked Questions

Can I use pizza sauce instead of marinara?

Absolutely. Pizza sauce works perfectly.

Why is my casserole watery?

Some sauces and vegetables contain a lot of moisture. Drain the beef well and sauté watery vegetables before adding them.

Can I use pre-shredded cheese?

Yes, but freshly shredded cheese often melts more smoothly.

Can I add cream cheese?

Definitely. A few spoonfuls stirred into the beef mixture create an extra creamy casserole.

How can I make it spicier?

Add crushed red pepper flakes, hot Italian sausage, jalapeños, or spicy pepperoni.

Can I use cauliflower?

Yes. Cook or roast the cauliflower first so it doesn’t release too much water into the casserole.

Is this good for meal prep?

Yes. It reheats very well, making it a convenient keto lunch or dinner throughout the week.

Final Thoughts

This Keto Low Carb Pizza Casserole is one of those recipes that makes sticking to a low-carb lifestyle feel a whole lot easier.

You get the bubbling cheese.

The savory meat.

The pepperoni.

The rich tomato sauce.

And all those classic pizza flavors in every bite.

But there’s no kneading dough, no waiting for pizza delivery, and no complicated crust to make.

I love putting this together on a busy evening because once it’s in the oven, I can clean up the kitchen while the cheese does its magic.

Then comes the best part—pulling out that bubbling casserole and watching everyone gather around.

It’s cozy, filling, and incredibly customizable.

Make it a supreme pizza one night.

Go meat lovers the next.

Add jalapeños when you’re craving something spicy.

Or keep it simple with beef, sauce, mozzarella, and pepperoni.

That’s what makes this recipe so useful.

It’s basically a pizza night in casserole form—and honestly, I don’t think anyone at my table is complaining about that. 🍕🧀🥩