I've come to a decision; I don't like frosting that contains more than a little confectioner's sugar. Confectioner's sugar is not a good taste. It takes a bit like fake sugar and doesn't seem to disovle and make the creamy frostings that I like. I will no longer make a cake with a confectioner's sugar frosting. There done. I've had enough bad frostings to finally come to the decision.
Now the cake part... yum! It's like banana bread with a cake like texture! I did add the chopped walnuts that the recipe said was optional. The recipe you ask. I can't share it because it isn't mine but it is published. You can find the banana cake and the chocolate frosting (if you like confectioner's sugar frosting) in Melissa Gray's All Cakes Considered.