L.D. 71, officially known as "An Act to Designate the Whoopie Pie as the State Dessert", read "The whoopie pie, a baked good made of two chocolate cakes with a creamy frosting between them, is the official state dessert".. Fall in love with this easy recipe for whoopie pies. Two light discs of chocolate sponge sandwich a fluffy vanilla buttercream filling. Perfect for cake sales, packed lunch treats or making friends at the office!. Heat oven to 180C/160C fan/gas 4 and line baking trays with parchment. Mix flour, cocoa, bicarb, sugar and a pinch of salt. Whisk the egg, oil and buttermilk together, then mix into dry ingredients with 75ml boiling water.. Be fore warned that all of their whoopie pies, whoopie ice cream sandwiches and whoopie cookies have no preservatives. Yay!!! That means that it is all fresh and it must be eaten though in maybe 2 days. I had the Red Velvet Whoopie Pie. It was a bit sweet for me and I couldn't taste the cocoa but it was as fresh and delish as it could be. I also couldn't finish it in one sitting. They're huge!!!!. Beat the butter and sugar in an electric mixer on high speed until light and fluffy. Beat in the egg, followed by the vanilla and buttermilk. Reduce speed to low, add dry ingredients and beat until combined.. Alice’s Old-Fashioned Whoopie Pies. Looking for a traditional whoopie pie recipe (meaning a whoopie pie filling without Fluff)? You’ve come to the right place..