30-Minute Low Carb Pizza Casserole

Low carb pizza casserole delivers everything you want from a slice—gooey cheese, tangy sauce, salty pepperoni—in a quick, no-dough format that actually feels like dinner. It comes together in one skillet and bakes in about 30 minutes, so it works even on a busy weeknight.

Ground beef, cream cheese, and a handful of toppings make it hearty without being heavy. It’s the kind of recipe that turns pizza cravings into a hot, satisfying meal with almost no effort.

What Makes This Casserole So Good

I keep coming back to this casserole because it’s truly hard to mess up. You brown some meat, stir in a few pantry ingredients, and let the oven do the rest.

The result is a bubbling skillet of melted mozzarella, a little spice from the pepperoni, and a creamy base that holds everything together. It tastes like a supreme pizza slice but eats like a proper meal.

Ingredients

• 1 lb lean ground beef: 90% lean gives good flavor without excess grease.
• 2 oz cream cheese, softened: adds creaminess and helps bind the casserole.
• 1/2 cup low-carb pizza sauce: choose a no-sugar-added brand.
• 1 cup shredded mozzarella: low-moisture part-skim melts the best.
• 1/4 cup grated Parmesan: for a salty, nutty layer.
• 1/2 tsp garlic powder: not garlic salt, just the powder.
• 1/2 tsp Italian seasoning: a dried blend works fine.
• 1/4 tsp red pepper flakes: optional, for a little heat.
• 1/4 cup sliced black olives: skip if you’re not an olive fan.
• 1/4 cup chopped green bell pepper: adds a fresh crunch.
• 20 pepperoni slices: regular size, for the top.
• Salt and pepper: to season the beef as it cooks.

Variations / Substitutions

• Protein: Ground turkey or bulk Italian sausage (casings removed) both work well and shift the flavor slightly.
• Veggies: Swap the bell pepper for mushrooms or baby spinach, or leave the vegetables out entirely for a simpler bake.
• Dairy-free: Use a dairy-free mozzarella shred and skip the Parmesan; a soft dairy-free cheese can replace the cream cheese.
• Spice: Omit the red pepper flakes and use a mild sauce, or add fresh jalapeño slices for extra heat.

For another low-carb pizza fix, try our Cauliflower Pizza Casserole.

How to Make Low Carb Pizza Casserole

Step 1: Brown the Meat

Preheat your oven to 400°F (200°C) while you start the meat. Heat a 10-inch oven-safe skillet over medium-high heat and add the 1 lb ground beef. Break it up with a wooden spoon and cook until no longer pink, about 6 to 8 minutes. Season with a pinch of salt and pepper.

The meat should be crumbled into small pieces with a few browned edges for depth. If the pan holds a lot of fat, spoon off all but about 1 tablespoon before moving on.

Step 2: Stir Together the Base

Lower the heat to medium-low and drop in the 2 oz cream cheese, 1/2 cup pizza sauce, 1/2 tsp garlic powder, 1/2 tsp Italian seasoning, and 1/4 tsp red pepper flakes. Stir until the cream cheese melts and the mixture turns a uniform deep red, about 2 minutes. Fold in the 1/4 cup olives, 1/4 cup bell pepper, and half of the mozzarella and Parmesan (about 1/2 cup mozzarella and 2 tablespoons Parmesan).

The base will look thick and saucy. Taste and add more salt or pepper if needed. The cheese will start to melt into the mixture, but that’s fine because it will finish melting in the oven.

Step 3: Layer the Casserole

Spread the meat mixture into an even layer across the skillet. Sprinkle the remaining 1/2 cup mozzarella and 2 tablespoons Parmesan evenly on top, then arrange the 20 pepperoni slices in a single layer over the cheese. This whole assembly takes less than a minute.

The pepperoni can overlap a little, but try to cover most of the surface. The cheese underneath acts as the glue that holds everything together.

Step 4: Bake the Casserole

Slide the skillet into the preheated oven and bake for 20 minutes. The cheese will melt and the edges will start to bubble. If you like your pepperoni extra crispy, switch the oven to broil for the last 1 to 2 minutes. Keep a close watch so it doesn’t burn.

When it comes out, the top should be golden in spots and the pepperoni curled at the edges. The kitchen smells exactly like a pizzeria.

Step 5: Garnish and Serve

Carefully remove the skillet with an oven mitt. The handle is very hot. Let the casserole rest for 5 minutes so it sets up enough to scoop. Tear a few fresh basil leaves over the top and serve straight from the skillet or plate generous spoonfuls.

Tips for the Best Low Carb Pizza Casserole

• Use an oven-safe skillet if you have one. It saves a dish and the cast iron helps the edges brown nicely.
• Don’t skip the cream cheese. It gives the casserole a creamy texture and helps the base hold together without any flour or crumbs.
• Pat any added vegetables dry with a paper towel before mixing them in. Extra moisture can make the casserole watery.
• Let the casserole rest a full 5 minutes after baking. It firms up just enough to scoop cleanly.

Bake times by pan:

Keeping Leftover Casserole Fresh

• Refrigerate: Store leftovers in an airtight container in the fridge for up to 4 days.
• Reheating: Microwave individual portions for 1 to 2 minutes, or warm the whole dish in a 350°F oven until heated through.

What Goes Well With This Casserole

A simple green salad with a lemon vinaigrette brightens up the richness. Roasted broccoli with garlic and olive oil is another easy side, its slight bitterness balancing the cheese. For something crunchy, garlic roasted green beans are a great match.

Frequently Asked Questions

Can I make this casserole ahead of time?

Yes. Assemble it up to a day ahead, cover, and refrigerate. Bake for an extra 5 to 10 minutes, and broil if you want a crisp top.

Is this recipe keto?

Each serving has about 6 grams net carbs, so it fits well within a standard keto diet.

Can I freeze leftovers?

Absolutely. Cool it completely, then freeze in an airtight container for up to 3 months. Reheat straight from frozen in a 350°F oven until hot.

My casserole turned out watery. What went wrong?

Excess moisture usually comes from not draining the meat or from watery vegetables. Drain the beef well and pat dry any add-ins before stirring them in.

What if I don’t have an oven-safe skillet?

Brown the meat in any skillet, then transfer the mixture to a greased 8×8-inch baking dish. Bake as directed, adding about 5 minutes.

Low Carb Pizza Casserole Recipe

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 20 minutes mins

Total Time 30 minutes mins

Servings: 4 servings

Calories: 420

Ingredients Method Notes

Ingredients

  

• 1 lb lean ground beef
• 2 oz cream cheese, softened
• 1/2 cup low-carb pizza sauce
• 1 cup shredded mozzarella
• 1/4 cup grated Parmesan
• 1/2 tsp garlic powder
• 1/2 tsp Italian seasoning
• 1/4 tsp red pepper flakes
• 1/4 cup sliced black olives
• 1/4 cup chopped green bell pepper
• 20 pepperoni slices
• Salt and pepper

Method

 

1. Preheat oven to 400°F (200°C). Brown the ground beef in an oven-safe skillet over medium-high heat, breaking it up, until cooked through, about 6 to 8 minutes. Drain fat and season with salt and pepper.
2. Lower heat to medium-low, add cream cheese, pizza sauce, garlic powder, Italian seasoning, and red pepper flakes. Stir until cream cheese melts, then mix in olives, bell pepper, and half of the mozzarella and Parmesan.
3. Smooth the mixture into an even layer in the skillet, top with the remaining mozzarella and Parmesan, and arrange the pepperoni slices on top.
4. Bake for 20 minutes until bubbly. Broil for 1 to 2 minutes at the end for crispy pepperoni if desired.
5. Rest 5 minutes, garnish with fresh basil, and serve.

Notes

Let the casserole sit for 5 minutes before serving; it will set up and be easier to scoop. The skillet handle stays very hot, so use an oven mitt. Broiling is optional, but it gives the pepperoni a crisp edge. Fresh basil adds a bright finish, though it’s still great without it.