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Recipes

Potato Gratin with Porcini Mushrooms and Mascarpone Cheese

By Michael LomonacoPhotography by Con Poulos
Image may contain Food Dessert and Cake

Recipe information

  • Yield

    8 to 10 Servings

Ingredients

4

ounces dried porcini mushrooms*

1

cup boiling water

2

tablespoons (1/4 stick) butter

2

tablespoons extra-virgin olive oil

1

/4 cup plus 2 tablespoons grated Parmesan cheese

1

1/2 cups mascarpone cheese (from about 1 1/2 seven-ounce containers)

1

cup whipping cream

3

garlic cloves, chopped

Pinch of freshly grated nutmeg

2

1/2 pounds russet potatoes (about 5 large), peeled, cut crosswise into 1/8-inch-thick slices

Need to make a substitution?

Preparation

  1. Step 1

    Place porcini and 1 cup boiling water in medium bowl. Place small bowl atop mushrooms to keep submerged. Let soak 20 minutes. Drain and coarsely chop mushrooms.

    Step 2

    Melt butter with oil in medium skillet over medium heat. Add mushrooms and sauté until beginning to brown, about 3 minutes. Sprinkle with salt and pepper. Remove from heat. Whisk 1/4 cup Parmesan and next 4 ingredients in small bowl; season with salt and pepper. DO AHEAD Mushrooms and cheese mixture can be prepared 1 day ahead. Cover separately and chill.

    Step 3

    Preheat oven to 325°. Butter wide shallow 2-quart baking dish. Arrange 1/4 of potato slices in bottom of dish. Sprinkle lightly with salt and pepper. Scatter 1/4 of mushrooms over. Repeat. Spread half of cheese mixture over, shaking dish to settle. Repeat with remaining potatoes and mushrooms in 2 layers each; spread remaining cheese mixture over. Sprinkle 2 tablespoons Parmesan over. Place gratin dish on rimmed baking sheet.

    Step 4

    Bake gratin until top is brown and sauce is bubbling at edges, about 1 hour 15 minutes. Let gratin rest 15 minutes before serving. DO AHEAD Can be made 2 hours ahead. Let stand at room temperature. Tent loosely with foil and rewarm in 300°F oven 20 minutes.

    Step 5

    *Available in the produce section of many supermarkets and at specialty foods stores and Italian markets.

Explore Bon AppétitGratinCasserolePorcini MushroomMushroomVegetableMascarponeCheesePotatoRusset PotatoSideNut-FreeVegetarianDinner