Brew a fresh shot of espresso. The “crema,” the reddish-brown foam on top of a fresh shot, is key to a frothy martini. Allow it to cool for a few minutes. If you’re short on time, you can place it in the refrigerator. If using cold brew concentrate, you can use it straight from the fridge.
For an extra professional touch and to help maintain the froth, place your martini or coupe glass in the freezer for at least 5 minutes before you start mixing.
Fill a cocktail shaker about halfway with ice. Using plenty of ice is crucial for chilling the drink quickly and creating that signature frothy top.
Pour the cooled espresso, vodka, coffee liqueur, and simple syrup into the ice-filled shaker.
Secure the lid tightly and shake as hard as you can for about 15-20 seconds. The shaker should feel frosty on the outside. This vigorous shaking is the secret to a thick, creamy foam, as it emulsifies the oils in the coffee.
Immediately strain the mixture into your chilled glass. For an ultra-smooth, velvety texture, use a fine-mesh strainer (double strain) to catch any small ice shards.
Gently place the three coffee beans on top of the foam. Serve immediately to enjoy the perfect froth.