Cook the Macaroni as directed on the box, set aside. Next, grease the crock pot with butter, then add in the cooked macaroni.
In another bowl mix melted butter, canned milk, milk, one egg, cheese, salt and pepper.
Once you have finished mixing all these together, pour this over macaroni.
Then place several slices of cheese over top and then place the lid and cook 3 to 3 1/2 hours on low.