Mustard Potatoes Au Gratin

Total Time:Prep: 15 min. Bake: 55 min.

By Taste Of Home Editorial Team

Recipe by Tangee Thaler, Silver Lake, Ohio

Tested by Taste of Home Test Kitchen

Updated on Apr. 18, 2022

These rich and creamy potatoes taste great with a variety of meats. —Tangee Thaler, Silver Lake, Ohio

TEST KITCHEN APPROVED

Mustard Potatoes Au Gratin

Yield:12 servings
Prep:15 min
Cook:55 min

Ingredients

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

  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.
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