Espressotini

Espressotini  -  

* 1 ½ oz. Kahlua
* 3 oz. vanilla vodka or vanilla syrup
* 1 ½ oz. chilled espresso coffee  
* Ice

Layer Kahlua, then vodka, in a martini shaker.
Add espresso coffee and ice.
Shake vigorously.
Strain into a Martini glass.
Optional: Garnish with a lemon twist.