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 . 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".. 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!. 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.. Traditional Amish Vanilla whoopie pie with sweet vanilla icing. This is one of my favorite recipes and I am sure that it will be one of yours too! Traditional Amish Vanilla whoopie pie with sweet vanilla icing. This is one of my favorite recipes and I am sure that it will be one of yours too! Traditional Amish Vanilla Whoopie pies. Moist vanilla cake with sweet vanilla icing! Yum!. Vanilla . Spoon 12 even dollops onto each baking sheet, leaving plenty of space between them. Bake on the middle shelf of the oven for 10 to 12 minutes. Bake on the middle shelf of the oven for 10 to 12 minutes..