Preheat oven to 350°F and grease a 9x13-inch baking dish with nonstick spray.
In a mixing bowl, whisk together the cake mix, melted butter, and one of the eggs. Press into bottom of prepared pan. Bake 7 minutes, then remove from oven.
While crust bakes, stir together the sweetened condensed milk, vanilla, remaining egg, pecans, coconut, and salt. Pour mixture over crust, then sprinkle with chocolate chips.
Return to oven and bake until top is lightly golden, 24-30 minutes more.
Let cool completely before slicing and serving. Enjoy!
