Yummo! Leftover cake has never tasted better!  In fact, we may now be making cake just for shakes!  My hubby mentioned this idea earlier in the day when I said I should do something with the left over cake and that’s all it took…we were making red velvet chocolate cake shakes before the day was through! WHAT YOU NEED For one shake… 1 Piece Left over cake ( Shown is a red velvet cake with chocolate frosting,…