Mix cake mix, butter, and egg with fork. Pat mixture into 9x13 pan that has been greased and floured.
For top layer, beat cream cheese and powdered sugar together, keeping small amount of sugar to sprinkle on top. Add the 2 eggs and vanilla and mix. Pour over cake mixture.
Bake for 30 mins at 350 degrees. Watch carefully as mixture tends to brown quckly. Sprinkle with powdered sugar and pecans while warm. Cut when completely cooled.
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