Easy & Delicious Cheesy Scalloped Potato Casserole!

4 cups thinly sliced potatoes
3 tablespoons butter
3 tablespoons flour
1 1/2 cups milk
1 teaspoon salt
1 dash cayenne pepper
1 cup grated sharp cheddar cheese
1/2 cup grated cheese, to sprinkle on top

1 In a small sauce pan, melt butter and blend in flour.
2 Let sit for a minute.
3 Add all of cold milk, stirring with a whisk.
4 Season with salt and cayenne.
5 Cook sauce on low until smooth and boiling, stirring occasionally with a whisk.
6 Reduce heat and stir in cheese.
7 Place a half of the sliced potatoes in a lightly greased one quart casserole dish.
8 Pour half of cheese sauce over potatoes.
9 Repeat with second layer of potatoes and cheese sauce.
10 Sprinkle the remaining cheese on top.
11 Top with some paprika for color.
12 Bake uncovered for about 1 hour at 350°F