A traditional cosmopolitan is made with 1 1/2 ounces of vodka, 1/2 ounces of orange liqueur, 1 ounce of cranberry juice, a squeeze of fresh lime juice and a twisted orange peel for garnish, according to the BBC. A martini shaker, spoon, strainer, match and martini glass are also needed.
To make a cosmopolitan, put the vodka, orange liqueur, cranberry juice and lime juice into a cocktail shaker, and fill it with ice. Shake the mixture for about 20 seconds, and then strain the liquid into a glass. For the garnish, hold the orange peel over the glass, and gently warm it with a match for about 20 seconds. To make a flamed garnish, bend the peel after warming it so that it releases oil onto the match, lighting a flame that burns on the surface of the drink.
For a variation on the traditional drink, replace 1 1/2 ounces of vodka with 1 1/2 ounces of pomegranate vodka, and add 1 ounce of pomegranate liqueur. Garnish the drink with a lime peel. Alternatively, replace the vodka with 1 1/2 ounces of citrus vodka, and pour 1 to 1 1/2 ounces of champagne over the drink after pouring the mixture into a glass. Garnish this with a lemon peel.