Step 1

Preheat oven to 350 degrees F. Coat a 9- x 13-inch baking dish with cooking spray.

Step 2

In a large bowl, with an electric mixer, beat cake mix, 1/2 cup butter, and 1 egg. Lightly press mixture into baking dish.

Step 3

In a medium bowl, beat cream cheese, the remaining eggs, the vanilla, and remaining butter. Slowly beat in confectioners' sugar until thoroughly mixed. Spread mixture over batter.

Step 4

Bake 45 to 50 minutes, or until golden on top. Make sure not to overbake; center should be a little gooey.