Best Scalloped Potatoes
Ingredients
- 3 pounds potatoes, thinly sliced
- ½ onion, thinly sliced
- 9 tablespoons all-purpose flour, divided
- 6 tablespoons butter, diced and divided
- salt and ground black pepper to taste
- 3 cups whole milk, or as needed
Directions
- Preheat oven to 375 degrees F (190 degrees C). Grease a 9×13-inch baking dish.
- Spread about 1/3 of the potato slices into the bottom of the prepared baking dish. Top with about 1/3 of the onion slices. Sprinkle 3 tablespoons flour over the potato and onion. Arrange 2 tablespoons butter atop the flour. Season the entire layer with salt and pepper. Repeat layering twice more.
- layers of sliced potato and onion in dish
- Heat milk in a saucepan until warm. Pour enough warm milk over the mixture in the baking dish so the top of the liquid is level with the final layer of potatoes.
- unbaked scalloped potatoes overhead
- Bake in the preheated oven until potatoes are tender, 45 to 60 minutes.
Enjoy 
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