What's a prune farmer's favorite way to eat prunes? Well, for the Mitchell Family the choice is easy: this Old-Fashioned Prune Cake recipe takes the (ahem) cake. A soft, prune-studded spice cake is covered in a buttery-sweet glaze that has everyone going back for another slice (or two.) Not convinced? What if we told you that it's the Pioneer Woman's favorite, too! It's time to get on the Prune Cake bandwagon.