By the 1860s, it was common for orange curaƧao, absinthe, and other liqueurs to be added to the cocktail. The original concoction, albeit in different proportions, came back into vogue, and was referred to as "old-fashioned". The most popular of the in-vogue "old-fashioned" cocktails were made with whiskey, according to a Chicago barman, quoted in the Chicago Daily Tribune in 1882, with rye being more popular than Bourbon. The recipe he describes is a similar combination of spirits, bitters, water and sugar of seventy-six years earlier.
The first mention in print of "old fashioned cocktails" was in the Chicago Daily Tribune in February 1880. However, the Pendennis Club, a gentlemen's club founded in 1881 in Louisville, Kentucky, claims the old fashioned cocktail was invented there. The recipe was said to have been invented by a bartender at that club in honor of Colonel James E. Pepper, a prominent bourbon distiller, who brought it to the Waldorf-Astoria Hotel bar in New York City.
With its conception rooted in the city's history, in 2015 the city of Louisville named the old fashioned as its official cocktail. Each year, during the first two weeks of June, Louisville celebrates "Old Fashioned Fortnight" which encompasses bourbon events, cocktail specials and National Bourbon Day which is always celebrated on June 14.
Wikipedia
1 cube of sugar
3 dashes Angostura bitters
3 ounces bourbon or straight rye whiskey