IBA official recipe includes:
Components
30 ml – Scotch whisky
30 ml – Amaretto
Preparation
Pour all ingredients into an old fashioned glass filled with ice cubes. Stir gently.
* Notes – The Godfather is a duo mixed drink made of Scotch whisky (especially smoky Scotch) and amaretto. Commonly served after dinner.
Enjoy ! ADB
The amaretto brand Disaronno claims the drink was the favourite cocktail of American actor Marlon Brando. The drink was also a favourite of the Rat Pack.