Ingredients

Ice 

1 1/2 ounces vodka 

1 ounce (2 tablespoons) fresh lime juice, plus lime twist for garnish 

1 teaspoon superfine sugar 

Lime twist 

Preparation

Fill a cocktail shaker with ice. Add vodka, lime juice, and sugar. Shake until well chilled, about 30 seconds. Strain into a martini glass. Garnish with lime twist; serve.