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Cheesy Scalloped Potatoes Recipe
Emily

Cheesy Scalloped Potatoes Recipe

Tender layered potatoes and onions baked under a creamy cheddar sauce until bubbling and golden. A cozy, classic side dish.
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Prep Time 20 minutes
Cook Time 1 hour 35 minutes
Total Time 1 hour 55 minutes
Servings: 6 servings
Course: Dinner
Cuisine: American
Calories: 360
Ingredients Equipment Method Notes

Ingredients
  

  • 2 lb russet potatoes peeled, sliced 1/8 to 1/4 inch thick
  • 1 medium yellow onion thinly sliced
  • 3 tbsp unsalted butter
  • 3 tbsp all-purpose flour
  • 1 tsp kosher salt
  • 2 cups whole milk room temperature
  • 1.5 cups mild cheddar cheese shredded
  • 0.25 tsp black pepper plus more to taste

Equipment

  • 8x8-inch baking dish
  • Medium saucepan
  • Whisk
  • Mandoline (optional)

Method
 

  1. Preheat oven to 400°F (200°C) and grease an 8x8-inch baking dish.
  2. Layer sliced potatoes and onions evenly in the dish.
  3. Make roux by melting butter, whisking in flour and salt, and cooking for 1 minute.
  4. Whisk in milk and cook until thickened, about 3 to 5 minutes.
  5. Stir in cheese until melted and smooth, then season with pepper.
  6. Pour sauce over potatoes, cover with foil, and bake 75 to 85 minutes until tender.
  7. Uncover and bake 10 minutes more or broil briefly to brown the top, then rest 10 to 15 minutes before serving.

Notes

  • Slice potatoes evenly for consistent cooking.
  • Shred cheese from a block for the smoothest sauce.
  • Rest the casserole before serving so it sets up.