To Make Whoopie Pie Filling: Beat egg white and mix with the milk, 1 teaspoon vanilla and 125g of the icing sugar. Mix well then beat in the butter and the remaining sugar. Beat until light and fluffy.. 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. I have baked 4-6 batches of whoopie pies using recipes from several books. Most of the time the top pie cracked. In some cases, the top pie cracked pretty heavily. Most of the time the top pie cracked.. But it’s not just bigger that makes this whoopie pie cake better. Let’s go to the next page (click the Next button below) to find out what makes the whoopie pie cake even better… Let’s go to the next page (click the Next button below) to find out what makes the whoopie pie cake even better…. Welcome to Flonga Games! All the games on our site are FREE to play and we launch new games every day. You can play thousands of free online games including action, life, puzzle, skill and sports games.. The whoopie pie is the official state treat of Maine (not to be confused with the official state dessert, which is blueberry pie).  Gob [the term indigenous to the Pittsburgh region] has been trademarked by the Dutch Maid Bakery in Johnstown..