Pour a double shot of coffee liqueur over the ice. You can add as much ice as you prefer – just remember that this will water your drink down!
Add your double shot of vodka. If you pour gently and slowly, the dark coffee liqueur should stay at the bottom of your glass creating a smart, layered look.
Add just a splash of soda water to give it some fizz. If you're using a soda water gun, hold your thumb down on the button for two seconds. This should be enough to mix the drink slightly but not to break up the layers.
Serve with a short straw and enjoy! If made properly and sipped through a straw, you should be able to taste the separate layers of flavor as they meld together.