1/2 stick butter
2 1/2 cups shredded sharp cheddar cheese
1 can cheddar cheese soup
1/2 cup sour cream
1 cup milk
3 beaten eggs
2 cups cooked macaroni
1/2 tsp dry mustard
1/2 tsp salt
1/2 tsp pepper
Mix all ingredients together in a crock pot and cook in crock pot for 3 hours.