Stone Cocktail

Fill a cocktail shaker with ice and chill the shaker for about 30 seconds, then discard the ice.

Add the light rum, sweet vermouth, and dry sherry to the chilled shaker in that order.

Fill the shaker with fresh ice and close the lid securely.

Shake vigorously for about 10-15 seconds until the shaker becomes frosty on the outside.

Strain the cocktail into a chilled coupe or cocktail glass using a fine strainer to remove ice.

Serve immediately while cold.