Originating from New Orleans, the timeless cocktail known as Sazerac is made with a combination of cognac or rye whiskey, bitters, absinthe, and sugar. Rye whiskey and absinthe can sometimes be replaced by bourbon whiskey and Herbsaint or Pernod.
Sazerac is probably the oldest known American cocktail, and in his 1937 book Famous New Orleans Drinks and How to Mix 'Em, Stanley Clisby Arthur claims that Sazerac was invented by Antoine Amedée Peychaud, a Haitian-born pharmacist who produced his eponymous bitters.
This recipe is adapted from the website of International Bartender's Association.