One might be tempted to ask if Whoopie Pies belong in an English Kitchen. I know they are an American Invention, or more specifically Pennsylvania Dutch.. 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".. Whoopie Pie. Reviews and Ratings Global Ratings: (20) Reviews in English (19) K. by KATHNH. 36. This recipe is not for beginners -- my aunt gave me this recipe when I was a young mom, and I couldn't get them to turn out right -- I really thought she had left things out! She was famous for her whoopie pies. If you are having trouble with it, here is how I do it, and mine come out great. Use a . 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.. 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..