Gooey Butter Cake

adapted from Gooey Butter Cake III by Barbara on allrecipes.com

1 (18.25 oz) package yellow cake mix
1/2 C. butter, melted
1 egg (original recipe had 2 eggs, might be better that way)

1 (8 oz) package cream cheese
2 eggs
1 t. vanilla extract
3 C. powdered sugar

Preheat oven to 350 F.
Mix cake mix, melted butter, and egg with a spoon. Pat into a 9x13 pan.
Mix cream cheese, 2 eggs, and vanilla with an electric mixer. Slowly beat in powdered sugar. Pour over cake layer.
Bake for 40-45 minutes. Cool. Sprinkle with powdered sugar.