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    Home » Recipes » Side Dish Recipes

    Potato & Shiitake Mushroom Gratin

    Published: Apr 4, 2010 · Modified: Nov 29, 2019 by Ashley

    This post may contain affiliate links, which won’t change your price but will share some commission.

    We were asked to bring a side dish to this year's Easter dinner, so I decided to try this recipe out. I cut it in half, and it made a lot! I sliced the potatoes with a mandolin which saved a ton of time. It's pretty time consuming, but the resulting gratin is rich and flavorful.

    Casserole dish with potato and mushroom gratin.

    Potato & Shiitake Mushroom Gratin
    Bon Appétit December 1997

    Serves 12

    Potato gratin is, of course, the traditional side dish with roast beef, and this version is just right for a special occasion. Adding flavor are typical steak house ingredients, like mushrooms, garlic and herbs. Place a baking sheet in the oven on the rack below the gratin to catch any liquids that may bubble over.

    6 tablespoons (¾ stick) butter
    1 ½ pounds button mushrooms, coarsely chopped
    1 ½ pounds fresh shiitake mushrooms, stemmed, caps coarsely chopped
    3 tablespoons minced garlic
    2 teaspoons dried thyme
    1 teaspoon dried rosemary leaves, finely crushed
    2 cups canned low-salt chicken broth
    3 pounds Yukon Gold or russet potatoes, peeled, cut into ⅛-inch-thick slices
    2 cups freshly grated Parmesan cheese (about 5 ½ ounces)
    2 cups half and half
    2 cups whipping cream
    1 ¼ teaspoons salt
    1 teaspoon black pepper

    Melt butter in large pot over high heat. Add all mushrooms and sauté until liquid evaporates, about 10 minutes. Add garlic, thyme and rosemary; sauté 1 minute. Add chicken broth and simmer until liquid evaporates, stirring often, about 18 minutes. Season with salt and pepper. Cool.

    Position 1 rack in middle of oven and another rack in bottom third of oven; preheat to 375°F. Butter 13 x 9 x 2-inch glass baking dish. Arrange ⅓ of potatoes in dish, overlapping slightly. Top with half of mushroom mixture. Sprinkle ⅓ of cheese over. Repeat layering ⅓ of potatoes, remaining mushroom mixture and ⅓ of cheese. Arrange remaining potatoes atop cheese. Whisk half and half, cream, salt and pepper in large bowl to blend; pour over potatoes. Cover loosely with foil.

    Place baking sheet on bottom rack in oven. Place baking dish on middle rack in oven and bake until potatoes are tender and liquid thickens, about 1 hour 15 minutes. Uncover. Using metal spatula, press on potatoes to submerge. Sprinkle remaining cheese over potatoes; bake until cheese melts and gratin is golden at edges, about 15 minutes longer. Let stand 10 minutes.

    MacGourmet Rating: 4 Stars

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    Hi, I'm Ashley and I’ve been writing about food & recipes here at Big Flavors from a Tiny Kitchen since 2006. I want to help you (yes, you!) gain confidence in the kitchen so you are excited to cook at home for yourself and your loved ones.

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