Prune cake, ewww! Just hold your potatoes there! Even as children we loved this cake. It's my mother's recipe, so I looked and there are a couple of similar recipes posted, but this one is the quintessential coffee cake. There is no glaze, no frosting, no confectioner's sugar on top. It is perfect and perfectly moist without anything to detract from the pure pleasure of this delightful cake. It is THE most wonderful complement to a good cup of Joe you can imagine!