To make pretty chocolate swirls for garnishing, simply melt chocolate, place it in a bag, snip off the corner, and drizzle it on a parchment lined baking sheet in whatever shapes or designs you like. Let it chill until hardened, and you're good to go!
I used Borgata chocolate liqueur, though you can use whichever brand you like best. Some chocolate liqueurs are darker than others, so appearance may vary. I've tried it out with a few different kinds and have noticed that some brands are thinner than others as well, though the flavor is great either way.
Whipped cream flavored vodka really adds to the sweetness factor of this cocktail. It pairs really well with the other two liqueurs. You can substitute with vanilla vodka or even chocolate vodka if you want.