Tip: Another recipe with the exact-same name "Chocolate Martini" ranks higher.
Add ice to a martini shaker.
Pour all the ingredients in the shaker.
Shake vigorously and thoroughly.
Strain into a chilled martini glass
Garnish the inside of the martini glass with a swirl of chocolate syrup and add a chocolate stirring stick.
Optional: you can replace vodka with a flavored Vanilla vodka