Prepare the cake according to the directions on the box.
Poke holes all over the baked cake as soon as it comes out of the oven. Drizzle with caramel syrup. Let cool completely.
Combine the chopped Snickers and whipped topping in a bowl. Add to the cooled cake.
Sprinkle with more chopped candy and drizzle with hot fudge and caramel sauce.
Refrigerate until cold, serve, and enjoy!