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Cheesy Scalloped Potatoes Recipe

4.6 from 94 reviews

This classic Cheesy Scalloped Potatoes recipe features tender layers of thinly sliced russet potatoes and onions baked in a creamy, rich cheddar cheese sauce. Perfectly baked until bubbly and golden on top, this comforting side dish combines simple ingredients into a deliciously satisfying dish ideal for family dinners or holiday meals.

Ingredients

Scale

Potatoes and Onions

  • 4 russet potatoes, peeled and sliced into ¼-inch slices (about 2 pounds)
  • 1 yellow onion, sliced into rings

Cheese Sauce

  • 3 tablespoons unsalted butter
  • 3 tablespoons all-purpose flour
  • ½ teaspoon kosher salt
  • 2 cups whole milk, room temperature
  • 1 ½ cups mild cheddar cheese, shredded
  • Salt and pepper to taste

Instructions

  1. Preheat the oven and prepare the dish: Preheat the oven to 400°F (200°C). Lightly spray an 8×8-inch casserole dish with nonstick cooking spray to prevent sticking.
  2. Arrange potatoes and onions: Alternately layer the sliced potatoes and onion rings in the prepared baking dish, staggering them to distribute evenly.
  3. Prepare the cheese sauce: In a medium saucepan, melt the unsalted butter over medium heat. Stir in the all-purpose flour and kosher salt, whisking constantly for about one minute to form a roux.
  4. Add milk and thicken: Gradually whisk in the room temperature whole milk and cook, stirring frequently, until the sauce thickens to a creamy consistency.
  5. Add the cheese: Remove the saucepan from heat and stir in all the shredded mild cheddar cheese at once. Continue stirring until the cheese melts smoothly, about 30-60 seconds.
  6. Combine and cover: Pour the prepared cheese sauce evenly over the arranged potatoes and onions in the casserole dish. Cover the dish tightly with aluminum foil.
  7. Bake: Bake in the preheated oven for 85-90 minutes, or until the potatoes are tender when pierced with a fork.
  8. Broil for topping: After baking, switch the oven setting to broil. Place the uncovered dish under the broiler and broil until the top is golden brown and crisp, watching carefully to avoid burning.
  9. Season and serve: Remove from the oven, season with additional salt and pepper to taste, and serve warm.

Notes

  • Use room temperature milk to avoid lumps in the cheese sauce.
  • Slice potatoes uniformly to ensure even cooking.
  • Covering with foil during baking prevents the top from drying out.
  • Broiling at the end adds a delicious crunchy cheese crust.
  • For a lighter version, use low-fat milk and reduced-fat cheese.

Keywords: Cheesy scalloped potatoes, baked potatoes, cheddar cheese sauce, creamy potato casserole