Brown chicken breasts for 20 minutes in half of the butter. Saute' mushrooms in the other half. Place chicken in 13x9 baking dish; top with mushrooms. Pour cream over top (save some for fettucine noodles if desired). Sprinkle with parmesan; bake for 30 minutes.
Cook fettucine noodles until tender;drain. Pour on remaining cream and melted butter. Add parmesan, salt and pepper to taste.