Banana Whoopie Pie Cake  While grocery shopping this past week I discovered that bananas were on sale for .19 cents a pound. I knew this would be a great time to stock up for recipe testing. Do you remember that delicious chocolate whoopie pie cake I posted a while back? Well… I thought, how good would a banana whoopie pie cake be? So I rearranged a few ingredients, and to my surprise the recipe turned out perfectly on the very first try! That doesn’t happen often, but when it does I celebrate! This time with lots of Banana Whoopie pie cake! This banana whoopie pie cake is everything I dreamed…