A spin on the classic cocktail, the Whiskey Sour, the Scotch Sour, is a great addition to your cocktail repertoire. A simple to make cocktail, this cocktail is the perfect drink for Burns Night. Sadly, the Scotch Sour is often overlooked for a bourbon-based Whiskey Sour. But why not try something different this Burns Night, and try a Scotch Sour instead. Like all Sour cocktails, this cocktail contains raw egg white, but you can leave it out if the thought of raw egg white turns your stomach.