Cooking Recipes / Chocolate Whoopie Pie Cake . Chocolate Whoopie Pie Cake is a delicious spin on the classic whoopie pie! A dense chocolate cake filled with a soft and pillowy marshmallow filling . QUALITY INGREDIENTS Cocoa is rich in Antioxidants! Crisco is Trans Fat Free! Flavorings are 100% Pure!. To Make Whoopie Pie Filling: Beat egg white and mix with the milk, 1 teaspoon vanilla and 125g of the icing sugar. Mix well then beat in the butter and the remaining sugar. Beat until light and fluffy.. Ever heard of a whoopie pie? They're a bit like a macaroon but with a more cake-like texture. Hugely popular Stateside, the name comes from when Amish women would put them in farmers' lunchboxes and they'd supposedly shout 'whoopie' if they found one in their box!. 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".. The whoopie pie (alternatively called a black moon, gob [term indigenous to the Pittsburgh region], black-and-white, bob, or "BFO" for Big Fat Oreo [also recorded as "Devil Dogs" and "Twins" in 1835 ]) is a US baked product that may be considered either a cookie, pie or cake..