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 . Fall in love with this easy recipe for whoopie pies. Two light discs of chocolate sponge sandwich a fluffy vanilla buttercream filling. Perfect for cake sales, packed lunch treats or making friends at the office!. Available for download now. 3.8 out of 5 stars 14. Amazon's Choice for "whoopie pie" Wilton 12 Hole Whoopie Pie Tin. by Wilton. £12.49 Prime. Eligible for FREE UK Delivery. More buying choices. £12.06 (6 new offers) 5 out of 5 stars 3. Product Description WILTON-Whoopie Pie Pan. Make fun Whoopie Pies perfect for sharing and Whoopie Pies: 70 Delectably Different Recipes Shown Step by . Whoopie Pie. New Adventure Cooking Design Dress Up Fun Job Makeover Puzzle Exclusive. . Whoopie Pie Cooking, Kitchen. When I'm in my kitchen, I like trying a new recipe every time. My cookbook is full of delicious desserts. Besides I have all the ingredients in the fridge. I guess it takes less than half an hour to cook some delicious cookies! Freshly baked and yummy! . 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.. Chocolate whoopie pies are an American favourite that you can now create at home with this easy to follow, delicious and simple recipe from Jamie Oliver..