Step 1.
- Chill a martini glass by filling it with ice water and setting it aside.
Step 2.
- In a cocktail shaker, combine 3 ounces of sake and 1 ounce of chocolate liqueur.
Step 3.
- Add 1/2 ounce of simple syrup and a splash of vanilla extract to the shaker.
Step 4.
- Fill the shaker with ice and shake gently for about 15 seconds.
Step 5.
- Empty the ice water from the chilled martini glass.
Step 6.
- Strain the mixture into the chilled martini glass.
Step 7.
- Garnish with chocolate shavings on top.