Exclusive Of The Coca Cola Recipe. It’s supposed to be one of the most closely guarded trade secrets on Earth – so secret that only two employees know it at any one time. The recipe of Coca Cola contains a list of ‘secret’ ingredients known as ‘7X’ – herbal extracts which give the drink it’s unique flavour, which the company has guarded for a century. But a book by author Mark Prendergast, recently republished on Amazon’s Kindle, actually has the whole recipe in the appendix. Prendergast claims to have found the recipe in a ‘formula book’ owned by the company’s founder. Oddly, that unique taste is actually herbs more familiar from curries and massage oils – including coriander, cinnamon and neroli.