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 Pizza Casserole (Slow Cooker)?

You need 12 ingredients. The key ingredients include: 3 lbs ground beef, ½ cup chopped onion, 1 (28 ounce) jar spaghetti sauce, 2 (4 1/2 ounce) jars sliced mushrooms, drained, and more.

Is Pizza Casserole (Slow Cooker) suitable as pasta & noodles?

Yes, Pizza Casserole (Slow Cooker) falls under the Pasta & Noodles category and is a great choice for this type of meal.

How do I store leftover Pizza Casserole (Slow Cooker)?

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

Pizza Casserole (Slow Cooker) Recipe

Name: Pizza Casserole (Slow Cooker)
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 lbs ground beef; ½ cup chopped onion; 1 (28 ounce) jar spaghetti sauce; 2 (4 1/2 ounce) jars sliced mushrooms, drained; 1 teaspoon salt (to taste); ½ teaspoon garlic powder; ½ teaspoon dried oregano; pepper; 1 (16 ounce) package wide egg noodles, cooked and drained; 2 (3 1/2 ounce) packagessliced pepperoni; 2 cups shredded cheddar cheese; 2 cups shredded part-skim mozzarella cheese

Try this homemade Pizza Casserole (Slow Cooker) recipe the whole family will love. Made with ground beef, onion, spaghetti sauce and mushrooms. Easy ste…

This Pizza Casserole (Slow Cooker) relies on simple, everyday ingredients such as ground beef, chopped onion, salt (to taste) and garlic powder. It comes together quickly and makes 4 servings, at about 1383 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 Pasta & Noodles

1383

kcal

Calories

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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Pizza Casserole (Slow Cooker)

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions