Rim a chilled martini glass with sugar by rubbing a lemon wedge around the rim and dipping it in sugar.
Fill a cocktail shaker with ice.
Add vodka, fresh lemon juice, simple syrup, and blueberry syrup to the shaker.
Shake vigorously for about 15 seconds until well chilled.
Strain into the prepared martini glass.
Garnish with fresh blueberries and a twist of lemon.