Fill a shaker three-fourths full with ice. Add the gin, lime juice and confectioners' sugar; cover and shake for 10-15 seconds or until condensation forms on outside of shaker. Strain into an ice-filled glass. Garnish with lime.
Vodka Gimlet: Substitute vodka for the gin.
Editor's Note: You may also strain the Gimlet into a chilled cocktail glass and serve without additional ice.