To make scalloped potatoes, you will need potatoes, butter, onion, garlic, flour, milk, chicken broth, heavy cream, salt, pepper, and paprika (optional)
. Here's an overview of how to make scalloped potatoes:
- Slice the potatoes into 1/8-inch-thick slices
. A mandoline slicer can accomplish this step, but a knife will also work
- Create the sauce by melting butter in a skillet, then add flour and whisk to create a roux. As you whisk, slowly add milk and broth. Add garlic, thyme, salt, and pepper, and cook for 2–3 minutes until the sauce lightly coats the back of a spoon, being careful not to boil it
- Arrange half of the potatoes and onions in an oiled baking dish. Then, top with half of the sauce and 1 cup of cheddar cheese
- Repeat layers, ending with sauce and cheese
- Cover the dish with foil and bake at 400°F for 30 minutes. Remove the foil and continue baking for 35–40 minutes, until the potatoes become tender and the cheese on top has browned
- Let stand at room temperature for 20 minutes before serving
