Fill an Old-Fashioned Glass: Add ice cubes to an old-fashioned glass to chill the drink.
Mix Ingredients: In a cocktail shaker, combine coffee liqueur and heavy cream. Shake gently to mix the ingredients, ensuring a smooth consistency.
Pour and Top: Pour the coffee liqueur and cream mixture over the ice in the old-fashioned glass. Top with a splash of soda water.
Stir (optional): Give the drink a gentle stir to combine the soda water with the other ingredients, but don’t stir too vigorously, as you want to maintain the drink’s effervescence.
Serve and Enjoy: Garnish with a twist of citrus peel or a few coffee beans if desired, and serve immediately.