Begin by rimming a martini glass with crushed graham crackers. To do this, spread a thin layer of the gingerbread syrup on a small plate, and another small layer of the crushed graham crackers on another plate. Dip the rim of the martini glass into the syrup, allowing any excess to drip off, and then dip it into the crushed graham crackers to coat the rim. Set the glass aside.
Fill a cocktail shaker with ice cubes.
Pour the vanilla vodka, coffee liqueur, gingerbread syrup, and heavy cream into the cocktail shaker.
Secure the lid on the cocktail shaker and shake vigorously for about 15-20 seconds until well-chilled.
Strain the mixture into the prepared martini glass, being careful not to disturb the graham cracker rim.
Sprinkle a pinch of ground cinnamon on top of the cocktail for extra flavor and a festive touch.
Garnish the gingerbread Martini with a small gingerbread cookie on the rim or floating in the drink for added flair.
Serve your Gingerbread Martini immediately and enjoy!