IBA official recipe includes:
Components
45 ml – Scotch whisky
25 ml – Drambuie
Preparation
Pour all ingredients directly into an old fashioned glass filled with ice. Stir gently.
* Notes – Standard Garnish – can be a twist of citrus, usually Orange, that will enhance the acidity and flavour.
Enjoy ! ADB
The Rusty Nail gained widespread popularity in the 1950s after being endorsed by New York’s 21 Club. The drink was also a favourite of the Rat Pack.