Scalloped Potatoes

5-6 cups thinly sliced potatoes
1/4 cup butter
1/4 cup flour
2 cups milk
1 1/3 teaspoons salt
1/8 teaspoon cayenne pepper
1 1/3 cups grated sharp cheddar cheese
2/3 cup grated cheese, to sprinkle on top
paprika

In a small sauce pan, melt butter and blend in flour.
Let sit for a minute.
Add all of cold milk, stirring with a whisk.
Season with salt and cayenne.
Cook sauce on low until smooth and boiling, stirring occasionally with a whisk.
Reduce heat and stir in cheese.
Place a half of the sliced potatoes in a lightly greased one quart casserole dish.
Pour half of cheese sauce over potatoes.
Repeat with second layer of potatoes and cheese sauce.
Sprinkle the remaining cheese on top.
Top with some paprika for color.
Bake covered for about thirty minutes at 350F. Remove cover and bake for addtl 30 min.