In a Manhattan, what should be done with the ingredients before serving?

In preparing a Manhattan, the correct approach is to stir and strain the ingredients. This method allows for the proper mixing of the whiskey, sweet vermouth, and bitters without introducing excessive air or dilution that shaking might cause. Stirring ensures that the ingredients are chilled and well combined, resulting in a smooth texture and balanced flavor, which is essential for a cocktail like the Manhattan that emphasizes the spirit's characteristics.

The process of stirring also maintains the clarity of the drink, which is important for both visual appeal and the overall drinking experience. Once stirred adequately, the cocktail is strained into a chilled glass, usually a cocktail or coupe glass, allowing for a refined presentation. This technique aligns with classic cocktail craftsmanship, where the subtle flavors of the ingredients are highlighted rather than masked by over-mixing or shaking.