Preheat oven to 350 degrees F.
Butter a 9 x 13 baking dish.
In a bowl, mix together yellow cake mix, 1 - egg,
and butter. Pat into bottom of prepared dish. In the same bowl, combine 2 - eggs, powdered sugar, cream cheese, vanilla, pecans, and chocolate chips. Pour over top to first layer.
Bake 50 to 60 minutes. Cool then cut into on-inch bars. Check to make sure these don't burn. Every oven is different.
20 - 30 pieces
Cut these bars with a sharp knife.
You may not use the knife on the people that will try to over power you and steal the dish for themselves.