The Night King's Sour 1 oz. White Walker by Johnnie Walker 1/2 oz. Blue Curacao 1/2 oz. lemon juice 1/2 oz. white grape juice 1/2 oz. vanilla syrup 1 egg white To make this medium cocktail, add all the ingredients into a shaker, put in ice, shake vigorously, then strain into a rocks glass. Image Source: Courtesy of Johnnie Walker