Potato and Mushroom Gratin

Potato and Mushroom Gratin
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Calories 152 cals
Total Fat 6 g
Cholesterol 13 mg
Dietary Fiber 2 g
Sodium 298 mg
Protein 7 g
Total Carbohydrate 18 g

Prep Time: 20 Minutes

Time to Table: 1 Hour 25 Minutes

Serves: 8 (3/4 cup per serving)


  • 8 ounces sliced baby portabella mushrooms
  • 4 teaspoons olive oil
  • 1 teaspoon unsalted butter
  • 1 cup sliced leek (white parts only)
  • 2 garlic cloves, thinly sliced
  • 2 tablespoons all purpose flour
  • 1 tablespoon chopped fresh thyme
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1 1/3 cups skim milk
  • 1/3 cup plus 1 tablespoon grated Parmesan cheese
  • 20 ounce package refrigerated sliced potatoes
  • 1/2 cup Daisy Light Sour Cream


Heat the oven to 350 degrees. Spray a 1 1/2-quart casserole with cooking spray. In a 10-inch nonstick skillet, cook the mushrooms in 2 teaspoons olive oil and 1 teaspoon butter over medium heat for 3 to 5 minutes or until browned, stirring frequently to brown all sides. Remove from the skillet. In the same skillet, cook the leek and garlic in the remaining 2 teaspoons of olive oil for 3 to 5 minutes or until tender. Stir in the flour, thyme, salt and pepper until mixed. Gradually stir in the milk until smooth. Bring to a boil and cook for 1 minute. Stir in 1/3 cup Parmesan cheese. Place the potatoes in the casserole dish. Fold in the white sauce mixture, sour cream, and all but 1/4 cup of the mushrooms. Sprinkle the casserole with the remaining 1 tablespoon Parmesan cheese and arrange the reserved mushrooms on top. Cover and bake for 45 minutes. Uncover and bake for 20 to 25 minutes or until bubbly and the potatoes are fork-tender. Dollop with the sour cream and serve.


Average Rating:
5 out of 0 5
hluthy 12/07/2016

This was an absolutely amazing recipe! I can't wait to make it for a crowd of people!

Carla74 11/15/2016

I had never thought to use Daisy sour cream in my mashed potatoes and from here on out I will be using it!! It made my mashed potatoes so creamy they melted in my mouth!! Will for sure fix for the holidays.

Bernie 04/24/2015

the recipe calls for sour cream, in the instructions, it does not mention the sour cream, what do we do with the sour cream, I know this may not contain 50 characters, but i would like to make this casserole.

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