Wow your guests with Kahlua Espresso Martinis this holiday season. It’s the sophisticated yet approachable coffee cocktail that will keep the holiday festivities going. You’ll need an espresso machine and shaker. It sounds fancy, but it’s just a matter of mixing. Shake 1 part Kahlua, 2 parts Absolut Vodka, and 1 part espresso with plenty of ice, then strain into a small cocktail glass to get rid of the small ice chips. Shake for 10 seconds for optimal frothiness.