Step 1.
- Chill a martini glass by placing it in the freezer or filling it with ice water.
Step 2.
- In a cocktail shaker, combine 2 oz of Irish cream liqueur, 1 oz of vodka, and 0.5 oz of vanilla syrup.
Step 3.
- Fill the shaker with ice and shake well until the outside is frosty.
Step 4.
- Strain the mixture into the chilled martini glass.
Step 5.
- Garnish with a vanilla bean or a dollop of whipped cream.