These classic scalloped potatoes are tender, creamy, and delicious. This is the way my mother always made her scalloped potatoes. The key is to heat the milk first!
Ingredients
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3 pounds potatoes, thinly sliced
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½ onion, thinly sliced
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9 tablespoons all-purpose flour, divided
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6 tablespoons butter, diced and divided
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salt and ground black pepper to taste
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3 cups whole milk, or as needed
Description
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Preheat oven to 375 degrees F (190 degrees C). Grease a 9x13-inch baking dish.
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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.
