Potatoes Au Gratin

Potatoes Au Gratin

from spendwithpennies.com
120 min

Tender potato and onion slices are layered and baked in a rich and delicious cheese sauce.

Ingredients

  • 2 ½ pounds red potatoes
  • 1 onion
  • 3 tablespoons butter
  • 3 tablespoons flour
  • 1 teaspoon dry mustard powder
  • 2 cups milk
  • 1 cup cheddar cheese (shredded)
  • ½ cup gruyere cheese (shredded)
  • salt & pepper to taste

Directions

  1. 1

    Preheat oven to 400°F.

  2. 2

    Wash potatoes and slice into ⅛" thin slices. Slice onion as thin as possible.

  3. 3

    Layer potatoes and onions in little stacks. Place stacks upright in a greased casserole 2.5qt to 3qt dish.

  4. 4

    Melt butter & flour in a saucepan and cook 2-3 minutes. Add seasonings and milk. Whisk over medium heat until thick and bubbly. Remove from heat and stir in cheeses until melted.

  5. 5

    Spoon cheese sauce over potatoes. Cover with foil (sprayed with cooking spray) and bake 60 minutes.

  6. 6

    Remove foil and bake an additional 20-30 minutes or until lightly browned and potatoes are cooked. Cool 15 minutes before serving.