Mix together and spoon into a 12 cavity whoopie pie pan that is sprayed with non stick spray. Cook 10 min in 350 degree oven For filling 5 tbsp of cool whip 2 tbsp Marshmallow Fluff Mix together . 4.4 out of 5 stars 31 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 by WMF. 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".. Step 4 Place marshmallows and 1 teaspoon warm water in a microwave-safe dish and microwave on high for 20 seconds, then stir until smooth. Spread the melted marshmallows over 16 of the rounds, then sandwich them together with the remaining rounds.. To make the buttercream: In a medium saucepan, whisk together the 120ml of milk and 2 1/2 tablespoons flour. Cook over medium-high heat, stirring frequently, until thick. Remove from heat set aside to cool. In a medium bowl, Beat together the butter, 100g sugar, 1/2 teaspoon salt and 1 tablespoon vanilla. Stir in the cooked milk mixture and beat for an additional 20 minutes, until really . 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. Spoon 20 spoonfuls onto trays, well spaced. Bake for 12 mins or until firm to touch, peel off trays. Cool..