Whoopie Pies are easy to make and very versatile, simply a pair of small sponge cakes glued together with a filling and, if desired, topping. Read More This entry was posted in Recipes , Sweet Recipes , Equipment and tagged whoopie pie , whoopie pies , dark chocolate , sponge cakes on 05/11/2010 by Patrick .. 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!. 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".. 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.. Key lime pie in hand-held form? Yes please! These whoopie pies sandwich a zesty, creamy key lime filling around soft, tender, honey graham cracker-flavored cakes. With just the right amount of sweetness, they're perfect after a summer barbecue, or as a snack with a cold glass of iced tea.. Lightly butter the Whoopie Pie Tray and spoon the mixture into the 12 cups, dividing evenly. Bake at 180°C (160°C for a fan oven) until springy. Leave in the tray for a few minutes and then tip out onto a cooling tray..