The Godfather Sour is a variation of the whiskey sour that swaps bourbon for amaretto. The drink is a sweet and sour mix of amaretto, lemon juice, sugar, and egg whites. It is garnished with a maraschino cherry and served on the rocks.

The drink is believed to have been created by Harry Johnson, a bartender and author of the first bartender’s guide, in the early 1800s. The drink was popularized by the Godfather movies, where it was made by …