This sounds good. Would a few of these keep you awake all night or have you falling asleep?
1 1/2 oz vodka
3/4 oz Kahlua coffee liqueur
1/4 oz white creme de cacao
1 oz cold espresso
Pour the vodka and Kahlua, creme de cacao and espresso into a cocktail shaker with ice. Shake well. Strain into a chilled cocktail glass.