1 fluid ounce brewed espresso
1 1/2 fluid ounces vodka
1 1/2 fluid ounces coffee-flavored liqueur (such as Kahlua®)
1 fluid ounce white creme de cacao
1 cup ice
Combine espresso, vodka, coffee liqueur, creme de cacao, and ice in a cocktail shaker. Cover and shake until chilled. Strain into a chilled martini glass.