Step 1.
- Chill a martini glass by filling it with ice water.
Step 2.
- In a cocktail shaker, combine vodka, vanilla liqueur, and simple syrup with ice.
Step 3.
- Shake vigorously for about 15 seconds until well chilled.
Step 4.
- Empty the ice water from the martini glass.
Step 5.
- Strain the mixture into the chilled martini glass.
Step 6.
- Garnish with a vanilla bean.