Which of the following Margaritas is prepared using a blender?

The Strawberry Margarita is prepared using a blender primarily because it incorporates fresh strawberries or strawberry puree, which need to be blended to achieve a smooth consistency. This blending process allows the flavors to meld together seamlessly while creating a refreshing, icy texture that is characteristic of a frozen drink.

In this preparation, ice is typically added to the blender along with the other ingredients, which could include tequila, lime juice, and simple syrup, resulting in a slushy form that enhances the drink's flavor profile and appeal, especially during warmer months.

The other Margaritas mentioned, such as the Golden Margarita, Blue Margarita, and Margarita on the rocks, are generally prepared by shaking or stirring the ingredients with ice, rather than blending them. These methods help to maintain the integrity of the spirits and mixers without transforming them into a frozen texture, which distinguishes them from the Strawberry Margarita.