Ooey Gooey Butter Cake

Cake
1 18 1/4-ounce package yellow cake mix
1 egg
8 tablespoons butter, melted

Preheat oven to 350-degrees. Combine the cake mix, egg, and butter and mix well with an electric mixer. Pat the mixture into the bottom of a lightly greased 13 by 9-inch baking pan. (Patty uses a glass dish, cleans up A LOT better than the metal ones.

Filling
1 8-ounce package cream cheese, softened
2 eggs
1 teaspoon vanilla
8 tablespoons butter, melted
1 16-ounce box powdered sugar

Oh and Patty makes it all together and only uses 8 tbls of butter, NOT 16 and only 2 eggs (I think).

As it is cooking, every once in a while shake the tar out of it, so the center part will stay sort of soft/gooey/runny. When the surrounding edge and part way toward the center gets brown and the center has set up, BUT not firm, it's done. It is supposed to be sort of gooey/sticky in the middle section.