Boston Sour is comestible very strong cocktail at 2 standard drinks. Shaken with 45ml bourbon barrell craft and 20ml lemon juice with 10ml sugar syrup as well as 15ml egg white including 100ml ice and best with an entree or small snack. Just place some ice cubes into cocktail shaker then add all ingredients to shaker and shake well. Pour all into short glass and add more ice to glass and dess with orange and cherry and served in a saucer glass cold.