The cobra's fang is a vintage tiki cocktail invented by Donn Beach that calls for a mixture of rums along with fassionola and falernum syrups, the juice of orange and limes, and a dash each of bitters and grenadine.

[1] The recipe from the book Hawai'i: Tropical Rum Drinks & Cuisine By Don the Beachcomber calls for it being garnished with fresh mint and a lime wheel, although a length of spiral cut lime peel made to look like a snake is used for aesthetics in some cobra named cocktails.

[2] The cobra's fang was one of many drinks with theatrical names placed onto "The Beachcomber"'s menus, going along with the likes of the Shark's Tooth and Nelson's Blood and meant to evoke a sense of faux-danger as part of the exotic tropical mood he set for his bars.

[3][4] As shown on a 1941 Don the Beachcomber drink menu, the cobra's fang cost $1 and was served in a tall curved glass.

[15] As served in the early days of the Beachcomber restaurants, the cobra's fang was presented in a tall curved glass.