1 1/2 oz of Vodka
1 1/2 oz of Kahlua coffee liqueur (or coffee liqueur)
3 oz of espresso (or coffee)
1 oz of Bailey's Irish Cream (or Irish Cream)
Brew espresso fresh. Pour into a cocktail shaker half-filled with ice cubes and add other ingredients. Shake well, strain into a cocktail glass, and serve.