Step 1

If using espresso, prepare and let 1 ounce cool to room temperature, or refrigerate before using. Place a martini glass in the refrigerator or freezer for at least 5 minutes to chill.

Step 2

Place the espresso or 1 ounce cold brew coffee, 2 ounces vodka, 1 ounce coffee liqueur, and 1/2 ounce simple syrup in a cocktail shaker. Add enough ice to fill the shaker halfway. Seal the shaker and shake vigorously until very cold and outside of the shaker is frosty, about 20 seconds. Pour through a strainer into the martini glass and garnish if desired.

Step 3

Garnish options:Decoratively place 1 or 3 coffee beans directly on top.Finely grate coffee beans with a Microplane over the top.Pour finely ground coffee beans or instant espresso into a fine-mesh strainer and dust over the top. You can use this method with a piece of paper over half the cocktail to dust only one half for a more dramatic presentation.