"One of the most popular Cake Mix Doctor recipes, Gooey Butter Cake is the signature cake of St. Louis where it was invented in the 1930s. Many variations of this cake exist, both from-scratch and using a cake mix. What makes my version appealing is that it is faster to prepare using a mix. The mix goes into the crust mixture, and a cream cheese filling is poured over before baking. What results is an incredibly rich and gooey cake, sort of a cheesecake and sort of a bar cookie that really lives up to its name!..."