Amaretto Sour Cocktail with Bourbon and Lemon, 500mlA truly modern and sophisticated take on an old classic. The best Amaretto Sour contains the obvious glug of the Italian almond based amaretto liqueur, lemon and sugar syrup but the crucial change comes with the addition of a small splash of bourbon whiskey. The richness of the whiskey balances the sweetness of the amaretto, making the cocktail an intoxicating mix of sweet, sour and nutty flavours.