What is the proportion of sweet to dry vermouth in a Perfect Manhattan?

The Perfect Manhattan is a classic cocktail that uniquely balances the flavors of sweet and dry vermouth. The correct proportion for a Perfect Manhattan is equal parts of both sweet and dry vermouth, which is represented in the measurement of 1/2 oz. of each.

The mention of 1/4 oz. of each in the incorrect option represents a misunderstanding of the proportions traditionally used in a Perfect Manhattan. While this measurement still maintains an equal balance, it does not align with the standard recipe, which calls for a more pronounced flavor impact through slightly larger measurements.

In essence, the correct answer showcases the classic approach to mixing a Perfect Manhattan, maintaining the ideal balance that enhances the drink's flavor profile while preserving its integrity as a cocktail known for its sophisticated taste. The proportions ensure that neither the sweet nor dry vermouth overwhelms the primary spirit—usually bourbon or rye whiskey—allowing for a harmonious blend that appeals to a wide range of palates.