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.. 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!. #HowItsMade Mondays 9/8c on Science This Whoopie Pie factory has a variety of delicious ingredients that give these traditional treats their signature taste.. 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".. This Wilton pie pan features 12 cavities, allowing you to create six whoopie pies. The tray also allows you to make ice cream sandwiches and macarons our of your favorite ingredients, such as chocolate, pumpkin or gingerbread.. We put together 12 of our most popular whoopie pie flavors for you to enjoy in our WICKED BIG Variety Pack. Just like a box of chocolates! A little something for everyone!.