from The Craft of the Cocktail
Shake the ingredients well with ice and strain into a chilled martini glass or serve over ice in an old-fashioned glass. Garnish with the lime wedge.
Be careful about switching fresh lime juice for Rose's lime juice; real Gimlet drinks want the taste of the preserved lime juice. When the drink is made with fresh lime juice and sugar, it is a sweet Gin Rickey, not a Gimlet.