2 oz vodka
1 oz coffee liqueur
1 oz freshly brewed espresso, cooled
1/2 oz simple syrup, optional
Ice
Add vodka, coffee liqueur, espresso, and simple syrup to a shaker
Fill the shaker with ice
Shake vigorously for 15 to 20 seconds
Strain into a chilled martini glass
Garnish with 3 coffee beans, optional