Preheat the oven to 350 degrees. Grease a 9×13 inch baking pan or spray with cooking spray.
In a medium bowl, mix together the cake mix, butter and egg, and press into the bottom of the prepared pan. Bake for 7 minutes and remove from the oven. The crust will continue to bake in the next step.
While the crust is baking, mix together the sweetened condensed milk, vanilla, egg, pecans and coconut. Pour evenly over the warm crust and sprinkle evenly with the chocolate chips. Bake for 24-30 minutes, until the top is a light golden brown. Don't overbake! Remove from the oven and cool completely before cutting into squares.
Notes
Source: Six Sister's Stuff - http://www.sixsistersstuff.com/2012/03/german-chocolate-cake-bars-recipe.html