#HowItsMade Mondays 9/8c on Science This Whoopie Pie factory has a variety of delicious ingredients that give these traditional treats their signature taste.. Bake in the preheated oven for 10 to 12 minutes. Let cakes cool then make sandwiches from two cakes filled with the filling. 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. Pumpkin. To cook the pumpkin, either bake or steam it, then peel and . I want to try with pumpkin so choose pumpkin whoopie pie. Whoopie pies are considered a New England trend and a Pennsylvania Amish tradition. Whoopie Pies have also been known as a “gobs.” in Western Pennsylvania. They are neither cookie, more like cake in cookie form. Usually sandwiched with sweeten filling.. While considered a New England classic and a Pennsylvania Amish tradition, they are increasingly sold throughout the United States. The whoopie pie is the official state treat of Maine (not to be confused with the official state dessert, which is blueberry pie).. 2010 Maine Whoopie Pie Festival. 28. 14. The weather is great and there are still plenty of whoopie pies! Come on down. 126. 38. Whoopie Pie Festival 2018. 130. 12. See All. See More . The Wilton Nonstick 12-Cavity Whoopie Pie Pans should be filled with 1/8 cup (2 Tbsp) of batter per shell, and the 24-cavity mini pans take half that much batter. So you may get fewer, or more, than 36 filled pies out of this recipe Also, although they freeze beautifully, if you don't want to bake that many, you can cut the recipe in half..