Soak top and bottom of a clay pot in water for at least 15 minutes. To prepare batter, combine cake mix, water, sour cream, and 2 egg whites in a mixing bowl; set aside. In another mixing bowl, combine 8 ounces cream cheese, sugar, remaining egg whites, and coconut. Line bottom and up sides of pot with waxed paper. Pour half of the chocolate mixture and spread cream cheese mixture on top. Pour remaining chocolate mixture over top. Cover and place in a cold oven. Set temperature to 400. Bake for 60 minutes. Meanwhile to prepare topping, combine frosting and remaining cream cheese in a mixing bowl. Mix until smooth. If frosting is too thick add a little water. Spread over cooled cake. ----