Potato and Mushroom Gratin Recipe

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Violet Hall Modified: March 24, 2022
Potato and Mushroom Gratin Recipe

How To Make Potato and Mushroom Gratin

Add an earthy twist to the usual potato side dish with this recipe for mushroom gratin. The rich and creamy result is definitely worth the wait.

Preparation: 20 minutes
Cooking: 1 hour 10 minutes
Total: 1 hour 30 minutes



  • 2lbsrusset potatoes
  • 2cupsheavy whipping cream
  • 3clovesgarlic
  • ½tspsalt
  • ¼tsppepper
  • tspnutmeg
  • 8ozmushrooms,sliced
  • 2shallots,finely chopped
  • 1tbspolive oil
  • 1tbspbutter
  • 1cupgruyere cheese,shredded


  1. Preheat oven to 350 degrees F and butter the bottom and sides of a 3 quart baking dish. Peel and very thinly slice potatoes and place them in a bowl of cold water.

  2. Heat a large skillet over medium heat with butter and olive oil. Add mushrooms and shallots and cook, stirring occasionally, until tender.

  3. In a large saucepan, add cream, whole garlic cloves, salt, pepper, and nutmeg and stir to combine.

  4. Bring to a boil over medium-low heat and remove from heat. Use a slotted spoon to remove the garlic cloves from the cream.

  5. Drain the potatoes well and season with salt and pepper to taste. Layer half the potatoes in the baking dish, slightly overlapping each other.

  6. Then spoon half of the mushrooms and shallots over the potatoes. Sprinkle half of the cheese on top and repeat the layers.

  7. Pour the cream sauce over all the potatoes and cover the dish with foil. Bake covered at 350 degrees F for 45 minutes.

  8. Uncover and bake for another 25 to 30 minutes until potatoes are tender and tops of potatoes are golden brown. All to rest for 10 to 15 minutes before serving.


  • Calories: 546.15kcal
  • Fat: 40.93g
  • Saturated Fat: 24.04g
  • Trans Fat: 0.08g
  • Monounsaturated Fat: 12.83g
  • Polyunsaturated Fat: 1.92g
  • Carbohydrates: 34.75g
  • Fiber: 3.05g
  • Sugar: 5.55g
  • Protein: 13.21g
  • Cholesterol: 137.98mg
  • Sodium: 393.42mg
  • Calcium: 306.11mg
  • Potassium: 902.24mg
  • Iron: 1.84mg
  • Vitamin A: 401.90µg
  • Vitamin C: 11.93mg
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