Mustard Potatoes Au Gratin Recipe
Mustard Potatoes Au Gratin Recipe photo by Taste of Home

Mustard Potatoes Au Gratin Recipe

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These rich and creamy potatoes taste great with a variety of meats. —Tangee Thaler, Silver Lake, Ohio
TOTAL TIME: Prep: 15 min. Bake: 55 min.
MAKES:12 servings
Test Kitchen Approved
TOTAL TIME: Prep: 15 min. Bake: 55 min.
MAKES: 12 servings


  • 1/3 cup finely chopped green onions
  • 3 tablespoons butter, divided
  • 2 cups heavy whipping cream
  • 1/2 cup Dijon mustard
  • 1 cup (4 ounces) shredded Swiss or Gruyere cheese, divided
  • 8 medium potatoes, peeled and thinly sliced


  1. In a small saucepan, cook onions in 1 tablespoon butter for 2 minutes or until tender. Stir in the cream, mustard and remaining butter. Bring to a boil. Reduce hear; simmer, uncovered, for 5 minutes.
  2. Reduce heat to low; stir in half of the cheese until melted. Remove from the heat. In a greased shallow 2-1/2-qt. baking dish, layer a third of the potatoes; top with a third of the sauce. Repeat layers twice; sprinkle with remaining cheese.
  3. Bake, uncovered, at 400° for 30 minutes. Cover and bake 25-30 minutes longer or until potatoes are tender. Let stand for 5 minutes before serving. Yield: 12 servings.
Originally published as Mustard Potatoes Au Gratin in Taste of Home's Holiday & Celebrations Cookbook Annual 2002, p166

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