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Creamy Mushroom-Potato Bake

The day I first made this, we'd invited a neighbor—a bachelor farmer—over, and I wanted to fix something hearty. It was a hit instantly. These days, our three sons enjoy it as a change from regular mashed potatoes. We've found that it's best served with beef...either with or without gravy. —Kathy Smith, Granger, Indiana
  • Total Time
    Prep: 30 min. Bake: 20 min.
  • Makes
    10 servings


  • 2-1/2 to 3 pounds white potatoes, peeled and cubed
  • 1 teaspoon salt, divided
  • 1 medium onion, finely chopped
  • 1/2 pound fresh mushrooms, chopped
  • 3 tablespoons butter, divided
  • 1/2 cup sour cream
  • 1/4 teaspoon pepper
  • 1/4 cup grated Parmesan cheese


  • Place potatoes in a large saucepan and cover with water. Add 1/2 teaspoon salt. Bring to a boil. Reduce heat; cover and cook for 10-15 minutes or until tender. Drain and mash (do not add butter or milk).
  • In a large skillet, saute onion and mushrooms in 2 tablespoons butter for 3-4 minutes or until just tender. Stir into potatoes along with sour cream, pepper and remaining salt.
  • Spoon into a greased 2-qt. baking dish. Sprinkle with cheese; dot with remaining butter.
  • Bake, uncovered, at 400° for 20-25 minutes or until heated through and golden brown.
Editor's Note: Potatoes can be prepared the day before and refrigerated overnight. Remove from refrigerator 30 minutes before baking.
Nutrition Facts
3/4 cup: 141 calories, 6g fat (4g saturated fat), 19mg cholesterol, 317mg sodium, 18g carbohydrate (3g sugars, 2g fiber), 4g protein.

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Average Rating:
  • Jim
    Sep 23, 2020

    This was tasty but a bit on the dry side. Not sure if I should add more sour cream, half and half or chicken stock? I did not mash the potatoes but they got semi mashed when stirring it all together to put in the baking dish.

  • geipa
    Mar 10, 2019

    my family was not crazy for this recipe. It was OK but will not make again.

  • abreendre
    Dec 29, 2018

    My new favorite potato casserole. The added mushrooms were a great add in I never would have thought of. A bonus - very quick prep.

  • Kelly
    Nov 7, 2018

    What else can I use if I don't have sour cream?

  • kaitlynreeb
    Sep 20, 2015

    Was Delicious! I added some spices and will be making this again for sure!

  • annrms
    Sep 19, 2015

    Delicious! I used a 4-cheese blend instead of just Parmesan. We had it with steak. Will definitely make this again. Thanks for submitting!

  • soulquest7
    Jan 19, 2015

    It says "don't add milk" but I don't see milk in the recipe. I did a vegan version and it turned out really good, added a little cayenne pepper. I also put some cashews on top.

  • a_lamaison
    Dec 22, 2014

    I served this as a meal in its own right, with just a little mustard on the side. It was delicious, lots of 'mmmmmm' all round the table. My mum finds it hard to have an appetite for anything these days, but she had seconds of this after a large first helping.The only change I made to the recipe was to use mostly Gryere cheese because I didn't have enough Parmesan. And 10 servings? We finished it with just the three of us! :-P

  • NumNum18
    Apr 24, 2011

    Instead of pepper and salt I used mrs. Dash and it was awesome... It also would go good with something to make it crunch on the top or something

  • countess cookie
    Jun 30, 2009

    I used sweet potatoes instead of white and added chopped brocolli and ground beef. Delicious!