1. Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13 inch cake pan.
2. In a large bowl mix together cake mix, butter and 1 egg. Pat batter into greased 9x13 inch pan.
3. In a medium size mixing bowl mix together cream cheese, 2 eggs and sugar. Pour the cream cheese mixture over the cake mix batter.
4. Bake for 35 minutes or until golden brown.