In a Perfect Manhattan, which two types of vermouth are included?

In a Perfect Manhattan, the cocktail is characterized by the use of two different types of vermouth: dry vermouth and sweet vermouth. The combination of these two vermouths creates a balanced flavor profile that enhances the smoothness and complexity of the drink. The dry vermouth adds a hint of crispness and dryness, which complements the rich, sweet notes of the sweet vermouth. Together, they create a harmonious blend that is essential for achieving the perfect Manhattan.

Using just one type of vermouth, as suggested in other options, would not deliver the distinctive flavor balance that defines a Perfect Manhattan. The skillful interplay of the two types of vermouth is what elevates this classic cocktail, making the inclusion of both essential.