Have y'all ever had regular Gooey Butter Cake? It's pretty fabulous. Just a regular cake on the bottom, but the topping is just plain amazing. It's gooey and buttery.
Combine the cake mix, egg, and butter and mix well. It will be thick and difficult to mix. Pat the mixture into the bottom of a lightly greased 13 by 9-inch baking pan.
In the bowl of your stand mixer, beat the cream cheese until smooth. Add the eggs, vanilla, and butter and beat together. Add the powdered sugar and mix until completely combined.
Spread the cream cheese mixture over cake batter and bake for 40 to 50 minutes. Make sure not to over bake as the center should be a little gooey.