Cookie Bar - Chocolate Toffee Cookie Bars

[Chowhound]

1 box Duncan Hines butter recipe cake mix (can substitute yellow or French vanilla)
1 stick butter
1/4 tsp vanilla extract
1 pkg cream cheese @ room temp (8 oz. pkg)
1 egg
powdered sugar (for rolling dough into)

Combine all ingredients with electric mixer until well blended. Chill dough for 2 hours. Roll into balls (about walnut size). Roll balls in powdered sugar. Bake on ungreased cookie sheet in 350-degree oven for 10 – 12 minutes. Dust with powdered sugar when completely cooled.