Blend cake mix with melted butter and TWO eggs.
Spread in greased (not floured) 9 x 13 pan.
Beat cream cheese til fluffy.
Add TWO eggs and vanilla and beat.
Gradually add confectioner sugar until smooth.
Spread over batter in pan.
Sprinkle nuts on top.
Bake at 350°.
Cool and sprinkle extra confectioners sugar on top.