For a classic frozen margarita, add 1 cup ice cubes, 2 ounces tequila, 2 tablespoons each of triple sec and lime juice, and 1 teaspoon of simple syrup into a blender and blend until smooth. For a strawberry version, add 1/2 cup strawberries to the blender.
Make different variations of frozen margaritas by adding additional ingredients to the classic version. To make most frozen fruit margaritas, add about 1/2 cup of any fresh or frozen fruit, such as seeded watermelon, diced mango, sliced peaches or raspberries. Another option is to use a fruit-flavored liqueur in place of the triple sec and in addition to the fruit to add more flavor.
When making frozen margaritas, make sure you are using a blender that can easily crush ice so that the finely crushed ice blends well with the other ingredients. If you don't have an ice-crushing blender, use pre-crushed ice, and shake the ingredients together vigorously in a cocktail shaker for a coarse, slushy frozen margarita.
Prepare the margarita glass by running a lime wedge around the rim, then dipping it in a plate of salt or sugar, depending on preference. To keep the margaritas as cold as possible when serving, chill the glasses briefly in the freezer ahead of time.