If you work in a bar with a draft system, it’s relatively easy to put an Espresso Martini on tap and let the nitrogen do its magic. For home bartenders, here’s how to get a similar effect using an iSi nitrogen dispenser. (Recipe adapted from iSi.com.)

• 10 oz cold brew coffee

• 2 oz coffee liqueur

• 4 oz vodka

• 1 oz simple or vanilla syrup

• Garnish: coffee beans

Mix all ingredients together in a pitcher, then, using a funnel, pour into the iSi nitro dispenser. Charge with an iSi nitro charger and shake 8 times. Pour into chilled cocktail glasses and garnish each with 3 coffee beans in a petal pattern. Makes 4 to 6 cocktails.