This cake looks delicious! Just look at all of that gooey condensed milk soaking into that chocolate cake. This recipe calls for chopped up heath bars on top, but I think you could put any and every chocolate candy bar you could want and it would be just as good.
In reading the comments on the original post for Better Than (you know what) Cake, it was noted that some people opted to put the candy bar on before AND after the whipped topping. It was also noted that some drizzle hot fudge in addition to the caramel. I say both are genius ideas and I will definitely be making mine that way!