The Singapore Sling is a cocktail that was developed sometime before 1915 by Ngiam Tong Boon (嚴崇文), a bartender working at the Long Bar in Raffles Hotel Singapore. The original recipe used gin, Cherry Heering, Bénédictine, and fresh pineapple juice, primarily from Sarawak pineapples which enhance the flavour and create a foamy top.
Most recipes substitute bottled pineapple juice for fresh juice; soda water has to be added for foam. The hotel's recipe was recreated based on the memories of former bartenders and written notes that they were able to discover regarding the original recipe. One of the scribbled recipes is still on display at the Raffles Hotel Museum.
Recipes published in articles about Raffles Hotel prior to the 1970s are significantly different from current recipes, and "Singapore Slings" drunk elsewhere in Singapore differ from the recipe used at Raffles Hotel.
The current Raffles Hotel recipe is a heavily modified version of the original, most likely changed sometime in the 1970s by Ngiam Tong Boon's nephew. Today, many of the "Singapore Slings" served at Raffles Hotel have been pre-mixed and are dispensed using an automatic dispenser that combines both alcohol and...