Whoopie pies are a versatile treat that are enjoyed by people of all ages and walks of life. Unfortunately, whoopie pies are often thought of as nothing more than a chocolate, cake-like cookie with vanilla filling. While it's true that the traditional whoopie pies featured this combination, they have grown so much since their humble beginnings and can now be made in a wide variety of flavors and combinations. And "The Whoopie-Pie Lover's Recipe Book:...