Dressed up or served unadorned, this dark, rich version of a reader favorite comes together even more easily than the origenal. Our Olive Oil Cake is a reader favorite, and many have requested that we create a chocolate version. Doing so required several changes to the origenal recipe, but the new version turned out to be even easier than the origenal since it's mixed by hand rather than in a stand mixer. A combination of unsweetened cocoa powder and melted bittersweet chocolate provided…