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Cheesy Scalloped Potatoes

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Rich and comforting cheesy scalloped potatoes layered with sweet onions and a velvety cheddar cheese sauce. Baked until golden and bubbly, this classic side dish is perfect for holidays or weeknight dinners alike.

  • Author: Sophia
  • Prep Time: 15 minutes
  • Cook Time: 1 hour 30 minutes
  • Total Time: 1 hour 45 minutes
  • Yield: 8 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Ingredients

2 1/2 pounds russet potatoes, peeled and sliced into 1/4-inch rounds

1 medium yellow onion, sliced into rings

3 tablespoons unsalted butter

3 tablespoons all-purpose flour

1 teaspoon kosher salt

2 cups whole milk, at room temperature

2 cups shredded mild cheddar cheese

Salt and pepper to taste

Instructions

  1. Preheat oven to 400°F (204°C) and lightly spray an 8×8-inch casserole dish with nonstick spray.
  2. Arrange the potato slices and onion rings in the dish, alternating in layers.
  3. In a medium saucepan over medium heat, melt the butter. Whisk in the flour and kosher salt, cooking for 1 minute to form a roux.
  4. Slowly stir in the milk and cook, whisking constantly, until the mixture thickens, about 4–5 minutes.
  5. Add the shredded cheese all at once and stir until melted into a smooth sauce.
  6. Pour the cheese sauce evenly over the layered potatoes and onions.
  7. Cover the dish with foil and bake for 85–90 minutes until the potatoes are tender.
  8. Optional: Broil for 2–3 minutes at the end for a golden, bubbly top.
  9. Season with additional salt and pepper before serving.

Notes

 

  • Swap cheddar for Gruyère, Monterey Jack, or sharp white cheddar for different flavors.
  • A spoonful of cream cheese in the sauce boosts creaminess.
  • Use a mandoline for evenly sliced potatoes.
  • This dish freezes well and reheats beautifully.

Nutrition

Find it online: https://savorymomskitchen.com/cheesy-scalloped-potatoes/