After I had made those whoopie pies for my brother, I realized something. If you can make cake balls with cake and icing, why can't you make whoopie pie balls with whoopie pies and whoopie pie filling. I was off, and on a mission. I crumpled the cake as in the cake ball recipe and added icing. Let me tell you, it was absolutely AMAZING! Try it. Really, right now! Go! You'll be a changed person!