How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Pepperoni Pizza Casserole?

You need 10 ingredients. The key ingredients include: 2 tablespoons olive oil, 12 ounces fresh cremini mushrooms, quartered lengthwise, 1 cup chopped onion (from 1 [11-oz.] onion), 1 (24-oz.) jar marinara sauce, and more.

Is Pepperoni Pizza Casserole suitable as general?

Yes, Pepperoni Pizza Casserole falls under the General category and is a great choice for this type of meal.

How do I store leftover Pepperoni Pizza Casserole?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Pepperoni Pizza Casserole Recipe

Name: Pepperoni Pizza Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 tablespoons olive oil; 12 ounces fresh cremini mushrooms, quartered lengthwise; 1 cup chopped onion (from 1 [11-oz.] onion); 1 (24-oz.) jar marinara sauce; 6 ounces pepperoni slices, divided; Cooking spray; 8 (1 3/4-oz.) frozen garlic bread slices, thawed; 8 ounces mozzarella cheese, shredded (about 2 cups); 1 ounce Parmesan cheese, grated (about 1/4 cup); 1/2 teaspoon crushed red pepper (optional)

Try this homemade Pepperoni Pizza Casserole recipe the whole family will love. Made with olive oil, cremini mushrooms, onion and marinara sauce. Easy st…

This Pepperoni Pizza Casserole relies on simple, everyday ingredients such as olive oil, (24-oz.) jar marinara sauce, pepperoni slices, divided and cooking spray. It comes together quickly and makes 4 servings, at about 610 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 General

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Pepperoni Pizza Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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