One of the restaurants that I first discovered in Portsmouth, N.H. is called Moxy. They specialize in small plates and though my wife and I don't have dinner there often (I prefer Black Trumpet) we sometimes make a pit stop there for dessert. This is where I found what I consider to be the perfect version of the Whoopie pie. Theirs is a much smaller disc than the ones we make here at school (and they serve a chocolate sauce alongside it). However, my memory of eating it led us to tinker with our recipe so that the cake shell flattens out a bit. I am not a big "cake" eater and I find that sometimes a whoopie pie can have too much cake and it can taste a bit dry. To remedy this we let the batter sit for about a half hour or so to rest. The batter is not so stiff and though it settles (just what we wanted) it still bakes up beautifully.