This classic from Tom Bullock’s 1919 The Ideal Bartender is basically “a fancy Whiskey Cocktail (aka Old Fashioned), with dashes of Curaçao and creme de menthe,” says Erik Adkins.
2 oz. bourbon
1 barspoon gomme syrup (or 2:1 simple syrup)
1 barspoon Grand Mariner
1 dash Angostura bitters
4 dashes crème de menthe
Garnish: lemon peel
Pour ingredients in a rocks glass with a large ice cube and stir for 10 seconds, then garnish.
Adapted by Erik Adkins for Hard Water, San Francisco