Make way, cupcakes - it's whoopie pie time! Everyone is falling in love with America's classic sandwich treat - two soft cookies with a creamy filling. Now, baker extraordinaire Claire Ptak, a pastry alum of Berkeley's famed Chez Panisse and proprietor of Violet, her own baking company, takes the humble whoopie pie to new heights. Here are 60 irresistible recipes - made with fresh, seasonal ingredients - that show home bakers how to make the components for more than two dozen distinctive, flavourful whoopie pies...