Make and bake your boxed CHOCOLATE cake according to the directions.
Allow the cake to cool at least 2 hours.
Once Cooled, You can ice the cake.
To prepare the icing, in a large mixing bowl, place butter, and vanilla.
Then add in confectioner's sugar and milk.
Combine. (if you are having issues (which you should not) with the icing, add more confectioner's sugar a tablespoon at a time. )
Using an icing spreader, smear the icing on the bottom layer of the cake.
Top the layer with the second cake.
Ice the sides of the cake.
Now the top.
FOR THE WAFER COOKIES
In a microwave-safe bowl, place in 4 oz of white chocolate. (I'd start with 2 and use that then if you need more warm-up the other 2 ounces.
Warm in increments of 30 seconds until you can freely stir (smooth) without lumps chocolate.
Dab a bit of the chocolate onto the cappuccino rolled wafer and then place the wafer upright against the side of the cake.
Repeat this process all around the cake until all of the cake sides is covered.
As you do this, leave enough space in between that a thin knife can cut through for serving.
Now, use the chopped and shaved Hershey Chocolate bar and sprinkle atop the cake.
Serve immediately or when you are ready.