from PDT
Muddle the mint leaves with the simple syrup. Add everything else, then shake with ice and fine-strain into a chilled coupe. No garnish.
In The Ideal Bartender Tom Bullock lists a Leaping Frog cocktail prepared with Hungarian Apricot Brandy and lime juice. I built upon the foundation, adding gin, mint, and bitters. —Jim Meehan, Summer 2007