The difference between a Manhattan and a Boulevardier lies in the choice of ingredients. While both cocktails share a similar base of whiskey, they differ in the other components that make up the drink.
1. Whiskey: Both the Manhattan and Boulevardier use whiskey as their base spirit. However, the type of whiskey used can vary. Traditionally, a Manhattan is made with rye whiskey, which lends a spicier and drier flavor profile to the cocktail. On the other hand, a Boulevardier typically calls for bourbon, which is sweeter and smoother in taste. That being said, you can experiment with different types of whiskey to suit your personal preference in either drink.
2. Vermouth: Another key difference lies in the type and proportion of vermouth used. In a Manhattan, sweet vermouth is the star, providing a rich and sweet flavor to counterbalance the whiskey. The classic ratio for a Manhattan is 2 parts whiskey to 1 part sweet vermouth. In contrast, a Boulevardier incorporates Campari, a bitter Italian aperitif, as a substitute for half of the sweet vermouth. This addition adds a distinct bitterness and complexity to the cocktail. The typical ratio for a Boulevardier is 1.5 parts whiskey, 1 part sweet vermouth, and 1 part Campari.
3. Bitterness: While both cocktails have a touch of bitterness, the source and intensity differ. In a Manhattan, the bitterness comes primarily from the whiskey and the herbal notes of the sweet vermouth. The addition of bitters, like Angostura, further enhances the complexity. On the other hand, a Boulevardier derives its bitterness from the Campari, which is known for its vibrant and bitter taste. The Campari adds a bold and assertive bitterness that sets the Boulevardier apart from the Manhattan.
4. Flavor profile: Due to the differences in vermouth and bitterness, the flavor profiles of the Manhattan and Boulevardier are distinct. A Manhattan is characterized by its balance of sweet, spicy, and herbal notes, with the whiskey taking center stage. It has a smooth and slightly sweet taste with hints of vanilla, caramel, and spices. In contrast, a Boulevardier has a more complex flavor profile, combining the sweetness of bourbon with the bitterness of Campari. It offers a bittersweet taste with notes of orange peel, cherry, and a lingering bitterness.
While both the Manhattan and Boulevardier share similarities as whiskey-based cocktails, they differ in their choice of vermouth, bitterness, and overall flavor profile. The Manhattan leans towards a sweeter and spicier profile, while the Boulevardier embraces a bolder and more bitter taste. Ultimately, it comes down to personal preference and the desired flavor experience.