Add gin, fresh lime juice, and simple syrup to a cocktail shaker.
Fill the shaker with ice.
Shake hard for 10–12 seconds until well chilled.
Double-strain into a chilled cocktail glass.
Garnish with a lime wheel on the rim.
The modern Gimlet is made with fresh lime juice and simple syrup, but the original called for Rose's lime cordial - a preserved sweetened lime juice used by the British Royal Navy to prevent scurvy. Using fresh lime and syrup separately gives you far greater control over balance and a noticeably brighter, more vibrant result.
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