1 (8 oz.) box macaroni (large shell)
1 (8 oz.) pkg. med. Cheddar cheese (cubed)
1 (8 oz.) pkg. Colby cheese (cubed)
1 egg
2 c. milk
1/2 stick butter
Salt and pepper to taste

Cook macaroni according to package and drain. Alternate macaroni and cheeses in casserole dish. Stir milk and egg together and pour over macaroni and cheese. Salt and pepper according to individual taste. Dot top of macaroni and cheese with butter. Bake in 350 degree oven for 35 to 40 minutes.