Bartenders at the Fairmont Hotel's Sazerac Bar in New Orleans make the house specialty according to this formula.
1/4 cup sugar
6 tbsp. Sazerac rye whiskey
6 dashes Peychaud's bitters
4 dashes Angostura bitters
2 tsp. Herbsaint
2 thin strips lemon zest
1. Chill 2 rocks glasses or old-fashioned glasses in the freezer. Meanwhile, make a simple syrup by putting sugar and 1/4 cup water into a small saucepan. Cover and boil over high heat, gently swirling pan over heat occasionally, until sugar dissolves, about 2 minutes. Transfer simple syrup to a small bowl and set aside to let cool completely.
2. Fill a cocktail shaker with ice cubes. Add rye, Peychaud's and Angostura bitters, and 2 tbsp. of the simple syrup (save remaining syrup for another use) and shake well.
3. Swirl 1 tsp. of the Herbsaint in each glass, coating insides with a thin film, and discard excess. Strain sazerac into glasses and garnish each with a strip of lemon zest.