Coca-cola is synonymous with Atlanta and the South. How about Dr. Pepper? Dr. Pepper was created in Waco, Texas back in the late 1880s. There is even a Dr. Pepper Museum in Waco! Dr. Pepper cake is to Texas as Coca-Cola cake is to Georgia. I actually was able to try a version of this cake when I visited Austin earlier this summer. This is a recreation of the popular Texas dessert.