Mashed Potato Casserole Recipes

Gold Post Medal for All Time! 899 Posts
October 1, 2012

casserole on plateThis recipe is easy to make and uses only a few ingredients.


Total Time: 45 minutes

Yield: 8 servings


  • 1 lb hamburger
  • 3 large potatoes, peeled and cubed
  • 1 large onion, diced
  • 2 cans cream of mushroom soup
  • 1/2 tsp oregano, crushed
  • 1/2 tsp garlic powder
  • 1/4 cup water
  • 1 cup cheese (cheddar or parmesan)
ingredients for casserole


  1. Preheat oven to 350 degrees F.
  2. Peel, rinse, and cube potatoes. Cook in boiling water until soft.
  3. cubed potatoes
  4. Dice onions. Brown hamburger in a large skillet. Then add onion and cook until soft.
  5. chopped onions
    uncooked meat and onions
    cooked meat and onions
  6. In a 9 x 13 in. casserole pan, combine soup and water. Pour in hamburger mixture and mix well.
  7. soup in casserole pan
    adding meat mixture 2
    mix in meat

  8. Add garlic powder and oregano. Stir to combine. (Note: I recommend putting the oregano in your hand and crushing it with your thumb before adding it.)
  9. add garlic powder
    add oregano
  10. Strain cooked potatoes and return them to the pot. Add 2 Tbsp. butter and 1/4 c. milk. Mash with a potato masher. Salt and pepper to taste.
  11. add butter to potatoes
    add milk to potatoes
    mashing potatoes
  12. Spoon mashed potatoes into casserole pan and spread over soup mixture. Top with cheese.
  13. spoon potatoes onto meat mixture
    spread out potatoes
    top with cheese

  14. Bake at 350 degrees F for 30 minutes or until bubbly.
  15. baked casserole

4 More Solutions

This page contains the following solutions.

Diamond Post Medal for All Time! 5,887 Posts
August 27, 2008

Prepare potatoes according to package directions. Heat sour cream, do not boil. Add mustard, salt and sugar. Stir to blend. Stir in hot potatoes and add onion. Sprinkle with paprika. Bake 30 minutes in 350 degrees F oven.


August 4, 2005

Nice to fix a day ahead and heat when needed. Allow extra time to bake if starting cold.


December 12, 2016

Mashed potatoes can easily be made ahead of time to make meal planning and dinner preparation easier. This page contains make ahead mashed potatoes recipes.

A dish of mashed potatoes.

January 7, 2021

Because we were given several 10 pound bags of potatoes, I needed to come up with some different ways to use them (a large quantity) at one time. This potato casserole is one answer to my dilemma.

A pan of baked mashed potato casserole.

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