Whoopie Pie Cake Recipe 2 cups of Marshmallow FLUFF (or you can melt some marshmallow along with a little bit of milk) 1 1/2 tsp of vanilla extract Cream the butter and the powdered sugar . KAISER 12-Cup Whoopie Pie Baking Pan 38 x 27 cm Creativ Very Good Non-Stick Coating Short Baking Time for Sweet and Savoury Recipes. Preheat oven to 180 C / Gas 4. Grease baking trays. Sift together the 250g flour, bicarbonate of soda,1/4 teaspoon salt, cocoa and 200g sugar.. 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.. What’s Valentine’s Day with out a little whoopie (pie that is)? That’s the question I’ve been asking myself all week. In fact, when I was perusing the store the other day and saw a heart shaped whoopie pie mold, I thought that is it!. 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"..