Begin by preparing the chocolate cake mix according to the instructions on the box. Once baked, let the cake cool before moving on to the next step (20-30 minutes in the freezer or let sit out at room temp for a hour).
Using a fork, poke holes all over the top of the cake. Make sure to poke deep enough that the sweetened condensed milk and caramel topping can seep into the holes.
Pour the can of sweetened condensed milk over the top of the cake, making sure to pour it evenly across the entire surface. The holes you created earlier will allow the milk to soak into the cake, adding extra moisture and sweetness.
Next, drizzle caramel topping over the cake, again making sure to distribute it evenly. The combination of the sweetened condensed milk and caramel topping creates a rich and decadent flavor that is sure to satisfy any sweet tooth.
Finally, spread a layer of whipped topping over the top of the cake. This will help to balance out the sweetness of the other ingredients and add a light and airy texture.
For an extra touch of indulgence, sprinkle a generous amount of Heath bars or toffee bits over the top of the cake. Not only do they add a delicious crunch, but they also complement the flavors of the chocolate and caramel perfectly.
Once assembled, you can either serve the cake immediately or store it in the refrigerator until you're ready to serve. This cake is best served chilled, as it allows the flavors to meld together and creates a truly decadent dessert experience.