Cheesy Pizza Pasta Casserole with Crispy Pepperoni Step-by-step instructions

Before you start

Before you begin cooking, gather all your ingredients and equipment to ensure a smooth assembly process. Preheat your oven to 375°F (190°C) so it is ready when the casserole is assembled.

Set a large pot of water on the stove to boil for the pasta. Chop any fresh herbs you plan to use for garnish, and measure out your shredded mozzarella and pepperoni slices so they are ready to layer.

Instructions

Pasta and Beef Preparation

1. 1Boil the Pasta
   Bring a large pot of water to a boil. Add 16 oz rotini pasta and cook until the pasta is al dente, about 8 to 10 minutes. Drain the pasta using a colander and set it aside.
   Look for The pasta should be firm to the bite.
   Tip Do not overcook the pasta as it will soften further in the oven.
2. 2Brown the Ground Beef
   In a large skillet over medium-high heat, add 1 lb ground beef. Cook, breaking up the meat with a wooden spoon, until it is fully browned and cooked through. Ensure the beef reaches a safe internal temperature of 160°F (71°C), then drain any excess grease from the skillet.
   Look for The meat is fully browned with no pink remaining.
   Safe temperature 160°F (71°C) internal temperature (ground meat)
   Tip Draining the grease prevents the casserole from becoming oily.

At the end of this first phase, the rotini pasta should be cooked to a firm al dente texture, and the ground beef should be fully browned with no remaining pink areas.

The beef must reach an internal temperature of 160°F (71°C) to ensure it is completely cooked. The kitchen will begin to smell savory and rich from the browning meat, setting a flavorful foundation for the casserole.

Sauce Mixing and Assembly

3. 3Combine Pasta and Sauce
   Pour 24 oz marinara sauce into the skillet with the cooked ground beef, stirring to combine. Add the drained rotini pasta to the skillet and toss everything together until the pasta is evenly coated with the meat sauce.
   Look for The pasta is completely coated in sauce.
   Tip Toss gently to avoid breaking the pasta spirals.
4. 4Assemble the Casserole
   Transfer the sauced pasta mixture into a 9x13-inch baking dish, spreading it into an even layer. Sprinkle 2 cups shredded mozzarella cheese evenly over the top of the pasta, then arrange 3 oz pepperoni slices in a single layer over the cheese.
   Look for The cheese and pepperoni cover the pasta completely.
   Tip Distribute the pepperoni evenly so every bite has a slice.

During this phase, the cooked pasta is thoroughly coated in the meat-infused marinara sauce, ensuring a uniform distribution of ingredients. Once transferred to the baking dish, the casserole is covered with an even blanket of shredded mozzarella and topped with pepperoni slices. The dish should look colorful and fully assembled, ready to go into the preheated oven.

Baking and Garnish

5. 5Bake the Casserole
   Place the baking dish in the preheated oven and bake at 375°F (190°C) for 20 minutes, or until the cheese is completely melted, bubbly, and lightly browned around the edges.
   Look for The cheese is bubbly and golden brown.
   Tip Watch closely in the last few minutes to prevent burning.
6. 6Garnish and Serve
   Remove the casserole from the oven and let it rest for 5 minutes. Sprinkle 1 tbsp chopped fresh herbs over the top for garnish, then slice and serve warm.
   Look for The cheese has set slightly before slicing.
   Tip Resting makes slicing cleaner and keeps the layers intact.

At the final checkpoint, the casserole emerges from the oven with a deeply bubbly, golden-brown cheese crust and crisp, slightly cupped pepperoni slices. The edges of the dish should be bubbling actively, and the aroma of melted cheese and toasted pepperoni will fill the air. Garnish with the fresh herbs immediately while the cheese is still hot.

Common mistakes

One common mistake is overcooking the pasta during the boiling stage, which leads to a mushy, soft casserole after baking. Always cook the pasta for one to two minutes less than the package instructions suggest for al dente.

Another error is failing to drain the browned ground beef sufficiently, which can result in a greasy layer pooling on top of the cheese. Finally, avoid using too much sauce, which can make the casserole soupy rather than cohesive.

How to tell it’s done

The casserole is perfectly done when the mozzarella cheese on top is completely melted, bubbly, and speckled with golden-brown spots. The pepperoni slices should be slightly curled at the edges and crisp.

To ensure food safety, the ground beef must be cooked to an internal temperature of 160°F (71°C) during the initial skillet browning phase before it is mixed with the sauce and baked.

• Ground meat: 160°F (71°C) in the thickest part