Cheesy Scalloped Potatoes
These Cheesy Scalloped Potatoes feature tender layers of russet potatoes and sweet onions nestled beneath a blanket of rich, creamy cheddar cheese sauce. This crowd-pleasing comfort food bakes to golden perfection—perfect for holidays or any cozy family dinner!
Equipment
- 8×8-inch Casserole Dish
- Saucepan
- Whisk
- Knife
- Cutting Board
- Aluminum Foil
Ingredients
- 4 russet potatoes peeled and sliced into ¼-inch slices (about 2 pounds)
- 1 yellow onion sliced into rings
- 3 tbsp unsalted butter
- 3 tbsp all-purpose flour
- 1/2 tsp kosher salt
- 2 cups whole milk room temperature
- 1 1/2 cups mild cheddar cheese shredded
- salt and pepper to taste
Instructions
- Preheat oven to 400°F (200°C). Lightly spray an 8×8-inch casserole dish with nonstick cooking spray.
- Arrange the potatoes and onions in the prepared baking dish, staggering potato and then onion slices for even layering.
- In a medium-size saucepan, melt butter over medium heat. Mix in the flour and kosher salt, stirring constantly with a whisk for one minute to form a roux.
- Stir in milk gradually, whisking constantly. Cook until mixture thickens and coats the back of a spoon.
- Stir in the shredded cheese all at once, and continue stirring until the cheese is fully melted and the sauce is smooth, about 30–60 seconds.
- Pour the cheese sauce evenly over the potatoes and onions. Cover the dish with aluminum foil.
- Bake for 85–90 minutes, or until potatoes are tender and cooked through.
- For a golden, crisp topping, change the oven setting to broil after baking and broil until the top is bubbly and golden brown. Watch closely to prevent burning.
- Remove from oven, season with salt and pepper to taste, and let rest a few minutes before serving. Enjoy your cheesy scalloped potatoes!
Notes
For the best texture, use a mandoline slicer to cut potatoes into even slices. You can prepare this dish a day ahead—just cover and refrigerate, then bake when ready to serve. Try adding a little garlic or swapping in Gruyère cheese for extra flavor!