The singapore Sling was invented at the famous Raffles Hotel by Ngiam Tong Boon. This recipe is my favourite mix, which I got from the Savoy Recipe Book, printed in the 1930's. The are many other recipes for Singapore Sling, which many can be found on the web.
Prep: 20 minutes
Cook: 20-30 minutes
Prep: 5 minutes plus 30-60 minutes soaking (optional)
Cook: 15 minutes
Prep: 5 minutes
Cook: 8-15 minutes