A cocktail of elegance & energy.
Fill a cocktail shaker with ice to chill the ingredients.
Add the vodka, coffee liqueur, espresso, and simple syrup (if using) to the shaker.
Shake vigorously for about 15-20 seconds to combine and chill the ingredients.
Strain the mixture into a chilled martini glass using a fine-mesh strainer or the shaker's built-in strainer.
Optional: Garnish the cocktail with a few coffee beans for an elegant touch.