A and B Sour is fortifying quite strong cocktail at 1.5 standard drinks. Shaken with 30ml amaretto and 30ml bourbon with 15ml lemon juice as well as 15ml egg white including 100ml ice and best at tea time. Just add all ingredients to shaker then vigorously shake and place ice into shaker. Shake well again and hawthorne strain into glass and served in a saucer glass cold.