- Ensure the espresso is freshly brewed for the richest flavor. Let it cool slightly before use. 
- In a cocktail shaker, combine the espresso, vodka, coffee liqueur, and pumpkin spice syrup. 
- Add ice cubes to the shaker, seal it, and shake vigorously for about 15 seconds. 
- Strain the mixture into a chilled martini glass. Garnish with a cinnamon stick or star anise for an added touch of autumn.