A cosmopolitan, or informally a cosmo, is a cocktail made with vodka, triple sec, cranberry juice, and freshly squeezed or sweetened lime juice.
TonicDB editorial guide
A good Cosmopolitan is a citrus-forward vodka sour with cranberry used for fruit and color, not a large glass of cranberry juice. The orange liqueur bridges the tart lime and berry flavors while a hard shake supplies the cold, clean finish associated with the drink.
Shake with firm, cold ice until the shaker frosts, then strain immediately into a chilled stemmed glass. Because cranberry products vary widely in sweetness, taste the mixture before shaking and reduce the cranberry slightly if it overwhelms the lime and orange liqueur.
A chilled coupe or cocktail glass keeps the drink cold without adding more dilution. An orange twist emphasizes the liqueur, while the recipe’s lime wheel reinforces the fresh citrus; either garnish should remain restrained so it does not crowd the rim.
Too much cranberry makes the drink opaque, sweet, and one-dimensional. Bottled lime juice has a similarly flattening effect. Use fresh lime, measure every ingredient, and do not let the drink sit on the shaking ice after it is cold.
Plain vodka works if citrus vodka is unavailable; express an orange peel over the finished glass to restore some aromatic lift. For a tarter version, trim the cranberry by a quarter ounce rather than adding more lime and changing the whole balance.
These notes explain how to execute and adapt the recipe shown above. Ingredients and serving traditions vary, so taste and adjust thoughtfully.
Contributed by @alfg