Heat oven to 350F.
Grease and flour a 9x13-in. pan.
Prepare cake mix as directed on package;
pour into prepared pan.
After 10 minutes of baking,
sprinkle with chocolate chips.
Continue baking until cake is done.
While cake is still hot, poke holes in it
with the handle of a wooden spoon.
Pour sweetened condensed milk over cake; let cool.
Top with caramel sauce, then whipped topping.
Sprinkle with candy bars.
(You can also sprinkle with shredded coconut).