Keto Pizza Casserole

Keto pizza casserole has absolutely stolen my weeknight dinner heart, and I do not say that lightly!! This keto pizza casserole tastes like your favorite cheesy, saucy pizza, but it’s low-carb, meal-prep friendly, and totally family approved. You get all the cozy comfort of pizza night without the carb crash, without the guilt, and honestly without the fuss. The first time I threw this together on a busy Tuesday, I wasn’t expecting much… and then my kids AND my husband AND my low-carb neighbor all asked for seconds. Keto pizza casserole for the win, again and again.

I found this recipe during one of those “it’s 5:30 pm and everyone’s starving” moments, and now it’s in our regular rotation. This is the kind of dish that saves you on long days, supports your keto goals, and still feels like a fun treat. It’s bubbly, cheesy, a little salty, and so unbelievably satisfying. And the best part? It’s easy. So easy. You can absolutely do this.

Why This Keto Pizza Casserole Will Be Your New Obsession

You are going to love this keto pizza casserole for so many reasons, it’s almost ridiculous. First, it’s FAST, and on a busy weeknight that matters so much, right? You brown some meat, stir in sauce, layer with cheese, bake, done. It tastes like a deep-dish pizza hug, but fits beautifully into a low-carb, keto, or just “trying to be a little healthier” kind of lifestyle. No crust to roll, no dough to rise, no weird keto bread experiments.

It’s also outrageously flexible. Cooking for picky kids? They can pick out the bell peppers. Cooking for your meal-prep self? Portion it into containers and boom, lunches for days. Cooking for your cheese-obsessed partner? Add extra mozzarella on top and make their whole evening. This casserole is comforting, cozy, and forgiving. If you’re nervous in the kitchen, I promise, this is a confidence-building recipe. You can swap ingredients, add veggies, leave things out, and it STILL tastes like pizza, still gives you that gooey cheese pull moment, still makes everyone happy. It’s low-carb, budget-friendly, and perfect for family dinners, game days, or just you, the couch, and Netflix.

Ingredients You’ll Need (And How to Make Them Work for You)

1 lb ground beef or sausage
1 cup low carb marinara sauce
2 cups shredded mozzarella cheese
1/2 cup pepperoni slices
1/2 cup chopped bell peppers (optional)
1/2 cup sliced black olives (optional)
1 teaspoon Italian seasoning
Salt and pepper to taste

The base of this keto pizza casserole is simple: ground beef or sausage plus low carb marinara. I love using 80/20 ground beef for a richer flavor, but you can totally go with leaner beef or even ground turkey if that’s what you’ve got in the fridge. If you do use sausage, look for a chicken or beef sausage that’s sugar-free and not overly sweet; check those labels because sneaky carbs do like to hide.

For the marinara, any low-carb or “no sugar added” sauce works—my favorites are usually the store brands from H-E-B or Whole Foods here in Austin, because they’re affordable and clean-ingredient. Mozzarella is your cheesy superstar; I grate mine from a block when I can because it melts a little nicer, but bagged shredded mozzarella is totally fine on a busy day. Pepperoni is the classic pizza topping, but if you don’t do pepperoni or can’t find a good low-carb one, go with sliced beef sausage, turkey pepperoni, or just extra veggies.

Bell peppers and black olives are optional, but they add color, texture, and some extra nutrients without adding a ton of carbs. Italian seasoning, salt, and pepper tie everything together in that unmistakable “pizza” flavor. Budget tip: buy cheese and meat in bulk when they’re on sale, portion, and freeze. It makes this recipe even more wallet-friendly. And remember—this is YOUR casserole. Toss in mushrooms, onions, or spinach if you like. Play with it!

How to Make Keto Pizza Casserole (Step-by-Step Overview)

1. Preheat the oven to 375°F (190°C).
2. In a large skillet, cook the ground beef or sausage over medium heat until browned. Drain excess fat.
3. Stir in the low carb marinara sauce, Italian seasoning, salt, and pepper.
4. In a baking dish, layer half of the meat mixture, followed by half of the mozzarella cheese, and half of the pepperoni slices. Repeat the layers with the remaining ingredients.
5. Add chopped bell peppers and olives if using.
6. Bake for 25-30 minutes until the cheese is bubbly and golden.
7. Let cool for a few minutes before serving.

Start by getting that oven hot—375°F is your sweet spot. While it preheats, brown your ground beef or sausage in a big skillet. You want the meat nicely cooked with no pink left, and a little bit of browning on the edges is flavor gold. If there’s a lot of grease, go ahead and drain it; this helps keep your casserole from feeling heavy or oily. Don’t worry if a little remains, it just adds richness.

Next, stir in your low-carb marinara, Italian seasoning, and a good pinch of salt and pepper. Let it simmer for a couple of minutes, just 2–3, so the flavors can marry. If it looks too thick, you can splash in a tablespoon or two of water, but not too much because you want this nice and saucy, not soupy.

Now for the fun part: layering. In a lightly greased baking dish, spread half of your meat mixture. Sprinkle on half the mozzarella, then tuck in half your pepperoni slices. Repeat with the remaining meat, cheese, and pepperoni. If you’re using bell peppers and olives, scatter them over the top now. It’ll look like a crustless, loaded pizza and that’s exactly the goal.

Slide the dish into the oven and bake for 25–30 minutes. You’re looking for bubbly cheese and golden spots on top—if it’s not browning, give it a couple extra minutes. If the edges start to get too dark, loosely tent with foil. When it comes out, let it rest for at least 5 minutes. This helps the layers set up a bit so you can scoop it neatly. And if your first scoop is messy? Totally fine. Still delicious. You honestly can’t mess this one up.

Helpful Tips, Make-Ahead, and Little Teacher Tricks

If you love to meal prep, this keto pizza casserole is your new best friend. You can assemble the whole thing up to a day in advance, cover it tightly, and keep it in the fridge. When you’re ready, bake it as directed, adding an extra 5–10 minutes if it’s going in cold. It also freezes really well: assemble, wrap well, freeze, then thaw in the fridge overnight before baking.

For storage, keep leftovers in an airtight container in the fridge for up to 4 days. To reheat, the oven or air fryer is best if you want that melty-cheesy top again—350°F for about 10 minutes usually does it. The microwave works too (we all do it), just know the cheese won’t be quite as stretchy.

Batch cooking? Absolutely yes. Double the recipe, use a big 9×13 pan, and you’re set for dinners plus lunches. For kids, you can go lighter on the Italian seasoning, add extra cheese, and maybe skip the olives if that’s a “nope” food for them. And remember my teacher voice here: read the steps once before you start, pull out everything you need, and then just go step by step. You’ve got this.

How to Serve and Enjoy Your Keto Pizza Casserole

I love serving this keto pizza casserole with something fresh and crunchy on the side—a simple green salad with a tangy vinaigrette, or sliced cucumbers and cherry tomatoes tossed with olive oil and salt. For non-keto family members, you can offer garlic bread or a small serving of pasta on the side, and everyone wins.

For a casual night, I scoop big spoonfuls into bowls and let everyone sprinkle on extra parmesan or red pepper flakes. For game days or gatherings, cut it into squares and serve it almost like a crustless pizza bake on a big platter. Leftovers are amazing in a lunchbox; just reheat and pack with some raw veggies. You can even spoon a bit of it into lettuce cups for a fun twist.

When I’m tired and just want comfort, I eat it straight from the bowl with a fork, maybe with extra olives on top (because I’m that person). There’s something very cozy and emotional about a dish that smells like pizza but still supports your low-carb goals. It feels like you’re not missing out at all, which is huge.

Keto Pizza Casserole FAQs

Every time I make this keto pizza casserole, I’m reminded how GOOD “easy” can taste. It’s simple, it’s cheesy, it’s wildly comforting, and it fits beautifully into low-carb or keto living without feeling like diet food at all. If you try it, tell me what toppings you used—drop a comment, send me a message, or tag me on social so I can cheer you on. You can totally make this your own, and you can totally make this tonight.

Keto Pizza Casserole

A delicious low-carb pizza casserole that's fast, easy to make, and perfect for family dinners or meal prep.

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 30 minutes mins

Total Time 40 minutes mins

Course Dinner, Main Course

Cuisine American, Italian

Servings 6 servings

Calories 380 kcal

Ingredients

  

Main Ingredients

• 1 lb ground beef or sausage Use 80/20 ground beef for richer flavor, or ground turkey if preferable.
• 1 cup low carb marinara sauce Look for 'no sugar added' brands.
• 2 cups shredded mozzarella cheese Grated from a block preferred for better melting.
• 1/2 cup pepperoni slices Can substitute with turkey or beef sausage.
• 1/2 cup chopped bell peppers Optional, for added color and texture.
• 1/2 cup sliced black olives Optional, for added flavor.
• 1 teaspoon Italian seasoning
• to taste Salt and pepper

Instructions

 

Preparation

• Preheat the oven to 375°F (190°C).
• In a large skillet, cook the ground beef or sausage over medium heat until browned. Drain excess fat.
• Stir in the low carb marinara sauce, Italian seasoning, salt, and pepper, and let it simmer for 2–3 minutes.
• In a baking dish, layer half of the meat mixture, followed by half of the mozzarella cheese, and half of the pepperoni slices. Repeat the layers with the remaining ingredients, adding bell peppers and olives if using.
• Bake for 25-30 minutes until the cheese is bubbly and golden.
• Let cool for a few minutes before serving.

Notes

This casserole can be prepared a day in advance or frozen. Also great for meal prep. Serve with a fresh side salad or garlic bread for non-keto eaters.

Keyword Easy Dinner, Keto Pizza, Low-Carb Casserole