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Overhead of a Spaghetti Pizza Casserole on a Cutting Board with Plates and Forks.
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4.93 from 41 votes

Spaghetti Pizza Casserole

This easy Spaghetti Pizza Casserole Recipe features spaghetti noodles as the crust, topped with savory meat-based marinara sauce, cheese, and pepperoni.
Prep Time35 minutes
Cook Time40 minutes
Total Time1 hour 15 minutes
Course: Dinner, Main Course
Keyword: Spaghetti Pizza Recipe
Servings: 12
Calories: 276kcal
Author: Amanda Rettke--iamhomesteader.com

Ingredients

  • 8 ounces spaghetti noodles, broken into 2-inch pieces, cooked al dente, cooled
  • 2 ½ cups (282.5 g) mozzarella cheese, shredded, divided
  • ¼ cup (61 g) whole milk
  • 1 large egg, beaten
  • ½ teaspoon Italian seasoning
  • ½ teaspoon garlic salt
  • ¼ teaspoon kosher salt

Sauce

  • 1 jar (24 ounces) marinara sauce
  • 1 pound ground beef
  • 1 teaspoon Italian seasoning
  • ½ teaspoon kosher salt
  • ¼ teaspoon black pepper
  • 3 ounces sliced pepperoni, about 35 slices, or enough to cover the top

Instructions

  • Preheat the oven to 425°F and spray a 9x13-inch baking dish with nonstick cooking spray.
  • In a large bowl, mix together the cooked, cooled noodles, ½ cup of mozzarella cheese, milk, egg, Italian seasoning, garlic salt, and salt.
  • Spread the mixture into the prepared baking dish in an even layer. Bake for 15 minutes.
  • While the pasta is baking, make the sauce. In a medium skillet over medium heat, brown the ground beef until no pink remains (about 8 minutes). Drain grease.
  • To the ground beef, add marinara sauce, Italian seasoning, salt, and pepper. Stir to combine.
  • After 15 minutes, remove the pasta from the oven. Reduce the oven temperature to 350°F.
  • Spread the sauce mixture over the noodle mixture. Top with the remaining cheese and a layer of pepperoni slices.
  • Return to the oven and bake for 25-30 more minutes, or until the cheese is hot and bubbly. Let rest for a few minutes before serving. Enjoy!

Nutrition

Calories: 276kcal