Gooey Butter Cake: there is no part of these three beautiful words that is wrong. This cake, which is actually more like a two-part bar cookie, is the pride of St. Louis, MO, a cake steeped in legend and even a little controversy.
It is also unique in that recipes almost always call for a cake mix, and many will argue that this is the "traditional" method of preparation—and yields the best end result.
This version twists the tradition slightly, using a chocolate cake mix instead of the usual yellow, and employs cocoa in the filling. The result is an addictively sweet variation on this rich regional treasure.