How should the Margarita be served for an "up" preparation?

Serving a Margarita "up" refers to serving it in a glass without ice, typically a chilled cocktail glass or a coupe. The correct preparation method for an "up" Margarita is to shake the ingredients with ice and then strain the mixture into the glass. Shaking the Margarita not only chills the ingredients thoroughly but also helps to mix them well, ensuring that the flavors of the tequila, lime juice, and any other components are well integrated.

Straining the Margarita before serving removes any ice shards, providing a smooth and refined drinking experience. This technique emphasizes the drink's texture and flavors, making for a more polished presentation and taste. The other methods listed do not accomplish the same effect: simply pouring might leave the drink too warm or diluted, stirring may not create the desired chill, and mixing typically implies using a different type of drink that doesn't involve shaking and straining. The shaking and straining method is essential for achieving the classic "up" style of a Margarita.