Two Fat Cats Whoopie Pie

Whoopie pie originated in the Pennsylvania Dutch country. There are many versions, including some that use Marshmallow Fluff as part of the filling. This one, created by pastry chef Deborah Hartman, is simply the best! I had never heard of whoopie pie before enjoying it at the Two Fat Cats Bakery in Portland, Maine. There, one of the bakers was in the midst of scooping the chocolate batter onto baking sheets and I was mystified because I never had seen cake batter baked on a flat sheet. The