From New York to the West Coast ­­ the passion for chocolate and vanilla martinis has taken California by storm. We found a recipe, posted by Emma in the New York Times:

Ingredients:
2 1/2 oz vodka
1 oz clear Crème de Cacao
Hershey's kisses for garnish

Combine vodka and Crème de Cacao. Shake over ice and strain into two chilled martini glasses. Garnish with a Hershey's kiss.