Keto Pepperoni Pizza Casserole – A Comforting, Low-Carb Favorite

If you miss the gooey, saucy comfort of pizza but want to keep carbs low, this keto pepperoni pizza casserole is your answer. It has all the classics—melty cheese, savory pepperoni, and rich tomato flavor—without the heavy crust. The prep is simple, the ingredients are easy to find, and the result feels like a weeknight win.

It’s kid-friendly, reheats well, and scratches that pizza itch without knocking you off your goals.

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Keto Pepperoni Pizza Casserole – A Comforting, Low-Carb Favorite

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Prep Time 10 minutes mins

Cook Time 25 minutes mins

Total Time 35 minutes mins

Servings: 8 servings

Ingredients Method

Ingredients

  

• Cream cheese – 8 oz, softened
• Eggs – 4 large
• Shredded mozzarella cheese – 3 cups, divided
• Grated Parmesan – 1/2 cup
• Garlic powder – 1 teaspoon
• Onion powder – 1/2 teaspoon
• Italian seasoning – 1 teaspoon
• Crushed red pepper flakes – optional, a pinch
• Low-sugar marinara or pizza sauce – 1 to 1 1/4 cups (check labels)
• Pepperoni slices – 5 to 6 oz
• Olive oil – 1 tablespoon, for greasing
• Optional add-ins – sliced black olives, chopped green bell pepper, mushrooms, cooked Italian sausage, fresh basil
• Salt and black pepper – to taste

Method

 

1. Preheat and prep the pan. Heat the oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish with olive oil or line it with parchment for easy cleanup.
2. Make the base. In a large bowl, beat the softened cream cheese until smooth. Whisk in the eggs until fully combined and silky.
3. Add cheeses and seasoning. Stir in 2 cups of shredded mozzarella and the Parmesan. Add garlic powder, onion powder, Italian seasoning, and a pinch of salt and pepper. Mix well.
4. Par-bake the crust layer. Spread the mixture evenly in the prepared dish. Bake for 12–15 minutes, until set and lightly golden around the edges.
5. Layer the sauce. Remove from the oven. Spread the low-sugar marinara over the base in a thin, even layer. You want coverage without pooling—start with 1 cup and add a little more if needed.
6. Add toppings. Sprinkle the remaining 1 cup of mozzarella over the sauce. Arrange pepperoni slices on top. Add any optional toppings (keep veggies minimal to avoid excess moisture).
7. Bake to finish. Return to the oven and bake for 12–15 minutes, until the cheese is melted and bubbling and the pepperoni edges are crisp.
8. Optional broil. For a browned top, broil for 1–2 minutes, watching closely so it doesn’t burn.
9. Rest and serve. Let the casserole rest for 5–10 minutes to set. Slice into squares and garnish with fresh basil or extra red pepper flakes if you like heat.

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What Makes This Special

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This casserole swaps traditional crust for a low-carb, cheesy base that bakes up tender and satisfying. It layers familiar pizza flavors—pepperoni, mozzarella, and Italian seasoning—so you get a full slice-of-pizza vibe in every bite. The textures are spot on: creamy base, stretchy cheese, and crisped pepperoni edges.

It’s also flexible, so you can add keto-friendly veggies or swap proteins without much effort. Best of all, it’s a one-pan dish that feeds a crowd or sets you up with leftovers.

Shopping List

• Cream cheese – 8 oz, softened
• Eggs – 4 large
• Shredded mozzarella cheese – 3 cups, divided
• Grated Parmesan – 1/2 cup
• Garlic powder – 1 teaspoon
• Onion powder – 1/2 teaspoon
• Italian seasoning – 1 teaspoon
• Crushed red pepper flakes – optional, a pinch
• Low-sugar marinara or pizza sauce – 1 to 1 1/4 cups (check labels)
• Pepperoni slices – 5 to 6 oz
• Olive oil – 1 tablespoon, for greasing
• Optional add-ins – sliced black olives, chopped green bell pepper, mushrooms, cooked Italian sausage, fresh basil
• Salt and black pepper – to taste

Step-by-Step Instructions

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1. Preheat and prep the pan. Heat the oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with olive oil or line it with parchment for easy cleanup.
2. Make the base. In a large bowl, beat the softened cream cheese until smooth.

   Whisk in the eggs until fully combined and silky.

3. Add cheeses and seasoning. Stir in 2 cups of shredded mozzarella and the Parmesan. Add garlic powder, onion powder, Italian seasoning, and a pinch of salt and pepper. Mix well.
4. Par-bake the crust layer. Spread the mixture evenly in the prepared dish.

   Bake for 12–15 minutes, until set and lightly golden around the edges.

5. Layer the sauce. Remove from the oven. Spread the low-sugar marinara over the base in a thin, even layer. You want coverage without pooling—start with 1 cup and add a little more if needed.
6. Add toppings. Sprinkle the remaining 1 cup of mozzarella over the sauce.

   Arrange pepperoni slices on top. Add any optional toppings (keep veggies minimal to avoid excess moisture).

7. Bake to finish. Return to the oven and bake for 12–15 minutes, until the cheese is melted and bubbling and the pepperoni edges are crisp.
8. Optional broil. For a browned top, broil for 1–2 minutes, watching closely so it doesn’t burn.
9. Rest and serve. Let the casserole rest for 5–10 minutes to set. Slice into squares and garnish with fresh basil or extra red pepper flakes if you like heat.

Keeping It Fresh

Let leftovers cool completely, then store them in an airtight container in the fridge for up to 4 days.

For meal prep, portion into single servings so it reheats quickly. Reheat in a 325°F (165°C) oven for 10–12 minutes or in a skillet over low heat with a lid to keep it from drying out. You can freeze slices for up to 2 months; wrap tightly and reheat from frozen at 350°F (175°C) until hot.

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Health Benefits

• Low in carbs, high in satisfaction. The egg-and-cheese base replaces flour, keeping net carbs low while staying filling.
• Good protein and fat balance. Eggs, cheese, and pepperoni offer protein and fat that help keep you full and support steady energy.
• Customizable micronutrients. Add mushrooms, peppers, or olives for fiber, potassium, and antioxidants without loading on carbs.
• Gluten-free by design. No wheat or grain-based crust.

Pitfalls to Watch Out For

• Hidden sugar in sauce. Many marinara and pizza sauces are loaded with sugar.

  Choose a brand with 4 grams of net carbs or less per 1/2 cup.

• Watery veggies. Mushrooms and bell peppers release moisture. Pre-sauté them or use smaller amounts to avoid a soggy casserole.
• Overbaking the base. The cream cheese-egg layer should be set but not rubbery. Pull it once it’s lightly golden at the edges.
• Too much sauce. A thin layer is key.

  Excess sauce leads to pooling and a looser slice.

• Low-quality pepperoni. Some brands have fillers and extra sugars. Check ingredients and choose a clean option.

Recipe Variations

• Supreme Style: Add browned Italian sausage, a few sliced olives, and pre-sautéed onions and peppers.
• Meat Lover’s: Mix cooked bacon crumbles and sausage into the cheese layer and top with extra pepperoni.
• White Pizza: Skip marinara and use a thin layer of seasoned ricotta (ricotta + garlic, lemon zest, and parsley). Top with mozzarella and pepperoni or grilled chicken.
• Spicy Kick: Add red pepper flakes to the base and use hot soppressata or spicy pepperoni.
• Veggie-Forward: Keep it keto with spinach, mushrooms, and zucchini ribbons—pre-sauté and drain well first.
• Pesto Twist: Swirl 2–3 tablespoons of sugar-free pesto into the sauce layer for bright, herby notes.

FAQ

Can I make this ahead?

Yes.

Assemble through the topping step, cover, and refrigerate for up to 24 hours. Add 5–10 minutes to the final bake time. You can also fully bake and reheat for easy weeknight meals.

Is this casserole freezer-friendly?

Absolutely.

Bake, cool completely, slice, and freeze in airtight containers. Reheat from frozen at 350°F (175°C) until the center is hot and the cheese is melty.

What’s the best low-carb sauce to use?

Look for a marinara with no added sugar and 4 grams net carbs or less per 1/2 cup. Brands that list only tomatoes, olive oil, garlic, and spices are a good bet.

Can I replace mozzarella with another cheese?

Yes.

Provolone or a low-moisture Italian blend works well. Keep at least half mozzarella if you want that classic stretch and melt.

How do I keep the casserole from getting watery?

Use a light hand with sauce, pre-sauté watery veggies, and let the casserole rest before slicing. If your pepperoni is very oily, blot it with a paper towel before adding.

Is this suitable for strict keto?

It can be.

Keep sauce minimal, avoid high-carb veggies, and choose full-fat dairy. Portion sizes matter, so track ingredients to fit your macros.

Can I make it dairy-free?

You can try dairy-free cream cheese and shredded mozzarella alternatives, but textures vary widely. Bake times may shift, and the result may be less melty.

Wrapping Up

This keto pepperoni pizza casserole delivers the cozy comfort of pizza night without the carb crash.

It’s simple to assemble, easy to customize, and ideal for meal prep. Whether you keep it classic or pack in your favorite toppings, it’s a reliable, crowd-pleasing dish that fits your low-carb goals. Keep a jar of good marinara on hand, and this recipe becomes a weeknight staple you’ll look forward to again and again.