The secret was discovered by producers of the radio program This American Life in a photograph used to illustrate an article on the history of Coca-Cola in an old copy of the Atlanta Journal-Constitution. The photo is a hand-written copy of the original recipe by John Pemberton, the inventor (is that the right term) of Coca Cola.
You can now make Coke in your own kitchen. The 7X flavour is the secret ingredient which gives Coca Cola it's unique taste and kick.
Here are the ingredients to make Coca-Cola:
A) The Syrup:
Fluid extract of Coca: 3 drams USP
Citric acid: 3 oz
Caffeine: 1 oz
Sugar: 30 (unclear quantity)
Water: 2.5 gal
Lime juice: 2 pints, 1 quart
Vanilla: 1 oz
Caramel: 1.5 oz or more for color
B) The 7X flavor (2 oz of flavor to 5 gallons syrup):
Alcohol: 8 oz
Orange oil: 20 drops
Lemon oil: 30 drops
Nutmeg oil: 10 drops
Coriander: 5 drops
Neroli: 10 drops
Cinnamon: 10 drops
Read the article about Coke's original recipe on the This American Life site.