In the late 1950s my grandmother clipped from a newspaper a recipe for German Chocolate Cake. It was new to her, but being of German ancestry she decided to try it. It was a sensation with her family and became the most-requested cake she baked.
Years later, we learned the history of the cake and it turns out that it was a craze that started in Texas and wasn't German at all, except that it was made with German's Sweet Chocolate, a brand named after its inventor whose last name was actually German (if his last name had been France, I guess it would have been called "French" Chocolate Cake).
Anyway, the above recipe for a single-layer rectangular cake is my favorite version. My family members have been known to argue about who gets the outside pieces because they have the most frosting.