Which drink can be garnished with anything chocolate?

The drink that can be garnished with anything chocolate is the Chocolate Martini. This cocktail is specifically designed to emphasize chocolate flavors, often incorporating ingredients like vodka, chocolate liqueur, and cream or other sweeteners. Because chocolate is a primary component of this drink, garnishing it with chocolate shavings, chocolate syrup, or other chocolate-based decorations complements its taste and enhances its appearance, making it visually appealing and indulgent.

In contrast, the other drinks listed do not share the same strong association with chocolate flavors. The Cosmopolitan is primarily a citrusy drink with flavors of vodka, triple sec, and cranberry juice. The French Martini features raspberry liqueur and pineapple juice, focusing on fruity notes instead. The Sour Apple Martini, as the name suggests, centers around apple flavors, typically with sour apple liqueur. Thus, adding chocolate garnishes to these cocktails would not align with their flavor profiles and may confuse the intended taste experience.