Whoopie Pies are a staple among the Mennonite and Amish communities in southeastern Pennsylvania–we’ve known people who would barter their own homemade specialties just to get a taste of a Whoopie Pie made by an expert! While many recipes allow the short cut of using a cake mix for the cake part of this filled cookie, we like this one, inspired by one of our favorite cookbooks, Betty Groff’s Pennsylvania Dutch Cookbook, and handed down a generation or two.