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Cheesy scalloped potatoes with layers of sliced potatoes, onions, and melted cheddar cheese.

Cheesy Scalloped Potatoes with Cheddar

Creamy cheddar sauce coats layers of russet potatoes and yellow onion in this baked scalloped potatoes recipe, ready in 105 minutes.
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Prep Time 15 minutes
Cook Time 1 hour 30 minutes
Total Time 1 hour 45 minutes
Servings: 8 servings
Course: Side Dish
Cuisine: American
Calories: 350
Ingredients Method

Ingredients
  

  • 4 russet potatoes peeled and cut into ¼-inch rounds (about 2 lb)
  • 1 yellow onion cut into rings
  • 3 tablespoons unsalted butter
  • 3 tablespoons all-purpose flour
  • ½ teaspoon kosher salt
  • 2 cups whole milk at room temperature
  • 1 ½ cups shredded mild cheddar cheese
  • salt and pepper to taste

Method
 

  1. Warm the oven to 400°F (205°C). Coat an 8x8-inch baking dish with nonstick spray.
  2. Layer the potato slices and onion rings in the dish, alternating between potato and onion.
  3. In a medium saucepan over medium heat, melt the butter. Whisk in the flour and salt, and keep stirring for one minute. Pour in the milk and continue cooking until the mixture thickens.
  4. Add the cheese all at once, stirring until it's fully melted and smooth, about 30 to 60 seconds.
  5. Pour the cheese sauce evenly over the potato-onion layers, then cover the dish with aluminum foil.
  6. Bake for 85 to 90 minutes, or until the potatoes are fork-tender.
  7. If you want a browned top, switch the oven to broil after baking and cook until the surface turns golden.
  8. Adjust seasoning with salt and pepper, then serve.