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

Description

1.  

2. Preheat oven to 375 degrees F (190 degrees C). Grease a 9x13-inch baking dish.

3. 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.