For the batter and a 24 cm-in-diameter springform pan: 320 g of all-purpose flour 90 g of cocoa powder 250 g of sugar 150 g of butter 150 g of sour cream 2 large eggs 230 ml of milk 1 tsp of . Ever had a whoopie pie? Two cakey chocolate cookies, sandwiching a swathe of minty icing, it’s like a cupcake sandwich! Two cakey chocolate cookies, sandwiching a swathe of minty icing, it’s like a cupcake sandwich!. 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!. . .