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 (plus 30-60 minutes resting time)
Cook: 2-3 minutes
Prep: 10 minutes plus resting of batter
Cook: 15 - 20 minutes