Pizza casserole with Italian sausage folds al dente penne into a robust marinara with browned sausage, onion, garlic, diced tomatoes, oregano, and basil. Parmesan, mozzarella, and pepperoni turn the top into a bubbling, golden layer with the familiar flavor of a loaded pizza.
The 9-by-13-inch casserole serves six in about 45 minutes. Cooking the pasta only to al dente and simmering the sauce before assembly keep the baked dish saucy without becoming watery or soft.
Ingredients for Italian Sausage Pizza Casserole
Use 16 ounces penne, 1 pound ground Italian sausage, 1 diced medium onion, and 2 minced garlic cloves. The sauce combines one 24-ounce jar marinara, one 14.5-ounce can diced tomatoes, 1 teaspoon dried oregano, 1 teaspoon dried basil, 1/2 teaspoon salt, and 1/4 teaspoon black pepper.
For the pizza-style topping, prepare 1/4 cup grated Parmesan, 2 cups shredded mozzarella, and 1/2 cup sliced pepperoni.
If you enjoy this recipe, you may also like Lasagna Soup.
How to Make Pizza Casserole
- Preheat. Heat the oven to 375°F and grease a 9-by-13-inch dish.
- Cook pasta. Boil penne until al dente, drain, and set aside.
- Brown sausage. Cook Italian sausage, breaking it apart, then add onion and garlic until softened.
- Simmer sauce. Stir in marinara, diced tomatoes, oregano, basil, salt, and pepper and simmer 5 minutes.
- Combine. Fold the penne through the sausage sauce and spread it in the dish.
- Top. Add Parmesan, mozzarella, and an even layer of pepperoni.
- Bake. Cook for 25 to 30 minutes, until bubbling and golden.
- Rest. Wait 5 minutes before serving.
For storage details after serving, the USDA leftovers and food safety guidance.
Cook Penne Only to Al Dente
Boil the penne in salted water according to the package's al dente timing. The center should be cooked but still offer a slight bite because the pasta continues softening in sauce during baking.
Drain thoroughly without rinsing. Surface starch helps the marinara cling, while water left in the tubes can dilute the casserole.
If you enjoy this recipe, you may also like Beef Cannelloni with Spinach.
Choose Mild or Spicy Italian Sausage
Either mild or hot ground Italian sausage works. Mild keeps the casserole approachable, while spicy sausage adds heat beneath the pepperoni.
Remove casings if using links, then break the meat into small crumbles as it cooks. Brown until the sausage reaches 160°F and no pink remains.
Soften Onion and Garlic with the Sausage
Add diced onion and minced garlic to the browned sausage. Continue cooking until the onion turns translucent and the garlic smells fragrant.
Stir often and scrape up the browned bits from the skillet. If the pan becomes dry after draining, add only a very small amount of oil.
Build and Reduce the Marinara
Stir the jarred marinara and diced tomatoes into the skillet, then add oregano, basil, salt, and pepper. Bring the mixture to a gentle simmer for 5 minutes.
This short simmer blends the herbs and evaporates a little excess moisture from the tomatoes. Taste before adding more salt because sausage, sauce, pepperoni, and cheese are already seasoned.
Coat Every Piece of Pasta
Add the drained penne to the skillet and fold until sauce reaches inside and around the tubes. No large patch should remain pale or dry.
If the skillet is too small, combine pasta and sauce in the baking dish or a large mixing bowl. Work gently so the al dente penne keeps its shape.
Spread an Even Casserole Layer
Transfer the sauced pasta to the greased 9-by-13-inch dish and level it from corner to corner. Even depth helps the center and edges heat at the same rate.
Press only lightly. Packing the pasta tightly can create a dense texture and push sauce away from the upper layer.
Add the Pizza-Style Topping
Sprinkle Parmesan first so its savory flavor sits close to the sauced pasta. Cover with all 2 cups mozzarella, then arrange pepperoni slices so every serving gets several.
Keep the cheese layer fairly even and do not stack pepperoni heavily in one spot. Exposed mozzarella between slices develops attractive golden bubbles.
Bake Until Bubbling
Bake uncovered at 375°F for 25 to 30 minutes. Look for active sauce bubbles near the edges, completely melted mozzarella, and light golden spots across the top.
If the cheese browns before the center is hot, cover loosely with foil. The middle should reach at least 165°F before the casserole leaves the oven.
Rest for Cleaner Servings
Let the dish stand for 5 minutes after baking. The sauce settles around the pasta, the cheese firms slightly, and spoonfuls hold together more neatly.
Use a broad serving spoon to reach the bottom and include sausage, pasta, sauce, and topping in each portion.
Topping Variations
Add sliced mushrooms, bell peppers, olives, or another favorite pizza topping. Cook vegetables that release substantial moisture before layering them over the pasta.
Cooked bacon or ham can replace some pepperoni. Keep the total topping amount moderate so the casserole heats efficiently and the mozzarella remains visible.
Troubleshooting
- Pasta is mushy: Boil only to al dente before baking.
- Casserole is watery: Drain pasta and simmer the tomato mixture for the full 5 minutes.
- Top is greasy: Drain sausage and avoid overloading pepperoni.
- Center is cool: Bake until the sauce bubbles near the middle and reaches 165°F.
- Cheese browns early: Cover loosely with foil for the remaining time.
Serving Suggestions
Balance the rich pasta with a green salad, roasted broccoli, or another simply seasoned vegetable. Garlic bread is useful when you want a larger, more indulgent meal.
Offer crushed red pepper and extra Parmesan at the table. Their separate placement lets each person control the heat and salt.
Make-Ahead Instructions
Assemble the casserole up to one day ahead, cool all components first, cover, and refrigerate. Wait to bake until the meal is needed.
A refrigerator-cold dish requires additional oven time. Keep it covered for part of that extra time if the cheese starts browning before the center becomes hot.
Storage and Reheating
Refrigerate cooled leftovers airtight for up to 4 days. Individual portions make convenient lunches and prevent reheating the entire casserole repeatedly.
Warm covered in a 350°F oven until the center reaches 165°F, or microwave portions in short intervals. Add a spoonful of marinara if stored pasta appears dry.
Conclusion
Cook penne to al dente, brown Italian sausage with onion and garlic, and simmer with marinara, tomatoes, and herbs. Fold in the pasta, transfer to a greased dish, and top with Parmesan, mozzarella, and pepperoni. Bake at 375°F for 25 to 30 minutes.
Frequently Asked Questions
- → Can I use spicy Italian sausage?
Yes. Mild and spicy sausage both work; choose based on the heat level you want beneath the pepperoni.
- → How do I keep pizza casserole from becoming watery?
Drain the pasta and sausage well, simmer the sauce and tomatoes for 5 minutes, and avoid uncooked watery toppings.
- → Can pizza casserole be assembled ahead?
Yes. Cover and refrigerate it for up to one day, then allow extra baking time because the dish begins cold.
- → How long do leftovers keep?
Store cooled casserole airtight in the refrigerator for up to 4 days and reheat to 165°F.