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 Mashed Potato Casserole?

You need 11 ingredients. The key ingredients include: 1 can mushroom soup, 1 lb. hamburger, 1/4 c. finely chopped onion, 1 egg, slightly beaten, and more.

Is Mashed Potato Casserole suitable as soups & stews?

Yes, Mashed Potato Casserole falls under the Soups & Stews category and is a great choice for this type of meal.

How do I store leftover Mashed Potato Casserole?

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

Mashed Potato Casserole Recipe

Name: Mashed Potato Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 can mushroom soup; 1 lb. hamburger; 1/4 c. finely chopped onion; 1 egg, slightly beaten; 1/4 c. dry bread crumbs; 2 Tbsp. chopped parsley; 1/4 tsp. salt; dash of pepper; 2 c. mashed potatoes; 1/4 c. shredded mild cheese; bacon

Try this homemade Mashed Potato Casserole recipe the whole family will love. Made with mushroom soup, hamburger, onion and egg. Easy step-by-step instru…

This Mashed Potato Casserole relies on simple, everyday ingredients such as mushroom soup, hamburger, finely chopped onion and egg, slightly beaten. It comes together quickly and makes 4 servings, at about 404 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.

Updated Jun 30, 2026

Serves 4 Soups & Stews

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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Mashed Potato Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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