Since the actual size is sort of hard to tell from the pictures (even with a lovely hand model – myself), I will point out that the big-daddy sized Whoopie Pies are nicely modeled by Colin in How to Eat a Whoopie Pie.. 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.. 496 results for whoopie pie Save whoopie pie to get e-mail alerts and updates on your eBay Feed. Unfollow whoopie pie to stop getting updates on your eBay feed.. 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".. 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.. The usual size is around 7.5cm/3-inches in diameter, however variations do occur and they have been known to be made much larger. There’s absolutely no reason why they shouldn’t be made much smaller too – mini whoopie pies served with afternoon tea..