Cheesy Keto Pizza Casserole (Ready in 30 Minutes)
This keto pizza casserole gives you everything you love about a classic slice—savory sausage, tangy sauce, and that pull of melted mozzarella—in a low-carb bake that comes together fast.
It’s one of those dishes that makes a weeknight feel a little more special, without any effort a keto pizza crust usually demands.
Why This Casserole Hits the Spot
The whole thing bakes into one cheesy, meaty scoop that scratches the pizza craving. The cream cheese melts into the marinara for a sauce that stays rich and never watery, and the broiler crisps the pepperoni in the last minute.
It’s sturdy enough to serve straight from the dish, but light enough that you don’t feel weighed down. I come back to it because it tastes like a deep-dish slice but leaves my kitchen with zero carb regrets.
Ingredients
- 1 lb ground Italian sausage, mild or hot: use the kind with no sugar in the ingredient list
- 1 cup low-carb marinara sauce: look for 4g net carbs or less per serving
- 4 oz cream cheese, cubed and softened: full-fat makes the sauce silky
- 2 cups shredded mozzarella cheese: fresh shreds melt best
- 1 oz sliced pepperoni: regular or turkey pepperoni both work
- 1 tsp Italian seasoning: a simple dried blend
- Salt and black pepper: adjust based on how salty your sausage is
Variations / Substitutions
- Swap the sausage: ground beef, ground turkey, or crumbled bratwurst all work; season the plainer meats generously.
- Dairy-free option: use a dairy-free mozzarella shred and swap the cream cheese for unsweetened coconut cream; the sauce will be a little looser.
- Add heat: stir in a pinch of red pepper flakes with the sauce or use hot Italian sausage.
- Herb note: if you have fresh basil, tear some over the top just before serving.
If you want a snack that hits the same pepperoni-and-cheese note with zero sauce, keto pepperoni chips are another quick fix.
How to Make Keto Pizza Casserole
Step 1: Brown the Sausage
Set a large oven-safe skillet over medium-high heat and add the 1 lb Italian sausage. Cook it, breaking the meat apart with a wooden spoon, for about 8 minutes, until no pink remains and the edges start to turn golden.
You want to hear a steady sizzle and see a few browned bits clinging to the pan. That little bit of color is where most of the savory depth comes from.
Step 2: Stir the Sauce
Reduce the heat to low, then add the 1 cup marinara sauce, the 4 oz cubed cream cheese, and the 1 tsp Italian seasoning. Stir gently for about 2 minutes, until the cream cheese fully melts and the sauce looks smooth and pale orange.
The mixture will tighten up as it heats, so keep it moving. Taste a spoonful and add salt and black pepper as needed, keeping in mind that the pepperoni and mozzarella will bring their own salt later.
Step 3: Layer the Casserole
If your skillet isn’t oven-safe, transfer the meat sauce to a greased 8×8 baking dish now. Spread it into an even layer, then scatter the 2 cups mozzarella over the top. Arrange the 1 oz pepperoni slices across the cheese however you like.
At this point it should look like a pizza ready for the oven, just thicker underneath. Set an oven rack about six inches from the broiler and heat the oven to 400°F (200°C).
Step 4: Broil and Serve
Bake the casserole for 15 minutes, until the cheese melts and bubbles at the edges. Switch the oven to broil and let it go 2 to 3 minutes longer, watching for the pepperoni to crisp and the cheese to get golden in spots.
Pull the dish out and let it rest about 5 minutes before you scoop it onto plates. That pause keeps the slices from sliding apart and lets the sauce set just enough to hold its shape.
A Few Tips for the Best Casserole
- Drain the sausage if it’s very fatty.: Too much grease will make the sauce pool and separate.
- Soften the cream cheese quickly: by microwaving it in a bowl for 15 seconds before adding it to the pan.
- Don’t skip the broil.: That 2-minute blast is what gives you the crisp pepperoni edges and the bubbly cheese top.
- Taste the sauce before you layer.: Cold cheese and pepperoni mute salt, so the sauce needs to be well-seasoned on its own.
Storing and Reheating Leftovers
- Refrigerate: cover tightly and store for up to 4 days. The cheese top stays tacky, not soggy.
- Reheating: warm individual portions in a skillet over medium-low heat with a lid, or microwave in 30-second bursts. The skillet brings back a little of the crisp bottom.
What to Serve with Keto Pizza Casserole
Crunchy romaine with a creamy Caesar dressing cuts through the richness of the cheese and sausage. Steamed green beans tossed with olive oil and a pinch of salt are another simple side that adds a clean, fresh bite without any extra carbs.
Frequently Asked Questions
Can I use ground beef instead of sausage?
Yes. Season it well with fennel seed, garlic powder, and paprika so the casserole doesn’t taste flat.
Is this casserole freezer-friendly?
It freezes okay for up to a month, but the mozzarella gets a little grainy when thawed. If you do freeze it, undercook the bake by a few minutes so reheating doesn’t dry it out.
How do I keep the casserole from being watery?
Start with a thick, low-carb marinara and drain any excess grease after browning the meat. Cream cheese also helps bind the sauce.
Can I add vegetables?
Absolutely. Sauté sliced mushrooms or bell peppers with the sausage so they release their moisture before the casserole bakes.
Keto Pizza Casserole Recipe
Ingredients
Method
- Brown the sausage in an oven-safe skillet over medium-high heat until cooked through and golden at the edges, about 8 minutes.
- Reduce heat to low, add marinara, cream cheese, and Italian seasoning, and stir until smooth, about 2 minutes. Season with salt and pepper.
- Spread the meat sauce evenly in the skillet or a greased baking dish, top with mozzarella and pepperoni, then heat the oven to 400°F.
- Bake for 15 minutes, then broil 2 to 3 minutes until the cheese is golden and pepperoni crisps. Rest 5 minutes before serving.
Notes
