Which Manhattan recipe includes both sweet and dry vermouth in equal parts?

The Perfect Manhattan is distinguished by the combination of both sweet and dry vermouth in equal parts. This recipe offers a balanced and nuanced flavor profile that sets it apart from other variations of the Manhattan, which typically use either sweet vermouth or only sweet vermouth in different proportions.

In a standard or bourbon Manhattan, the predominant use of sweet vermouth leads to a richer, sweeter taste, focusing primarily on the bourbon's qualities. The Perfect Manhattan, by including dry vermouth alongside the sweet, introduces a complexity that mellows some of the sweetness while adding dry, herbal notes, thus creating a perfect harmony of flavors.

The term "perfect" in cocktail nomenclature often refers to the use of both types of vermouth, which is a specific and notable characteristic of the Perfect Manhattan. This mixing technique caters to those who enjoy a more sophisticated take on the classic drink, effectively showcasing the versatility of vermouth and how it can alter the overall taste and mouthfeel of the cocktail.