Bake the Cake: Prepare the cake mix according to the package directions and bake in a 9x13 inch pan. Allow it to cool for 5 minutes.
Poke Holes: Use a wooden spoon handle to poke holes throughout the cake.
Add Sweetened Condensed Milk and Caramel: Let the cake cool for about 30 minutes. Slowly pour the condensed milk over the cake, allowing it to soak into the holes, and then drizzle caramel topping over.
Cool Completely: Refrigerate to cool thoroughly.
Top with Cool Whip and Candy: Spread Cool Whip on top and garnish with chopped Snickers bars. Drizzle more caramel if desired. Enjoy!