Baked Macaroni and Cheese

4. cups uncooked elbow macaroni (or wheely kind or whatever!)
1 1/2 sticks of butter or margarine
3 cups grated cheddar cheese
1 cup grated mozzarella cheese
5 cups milk (I usually do about 3 cups of milk and 2 cups of water. . .)
Salt and Pepper to taste

Preheat oven to 350 degrees. Layer macaroni, butter, and cheeses in the order given in a 9-by-13 dish. Pour milk over the top layer. Bake for one hour. Do not cover.