Combine the brandy
, simple syrup
, lemon juice
, lime juice and egg white in a cocktail
shaker. Cover and shake well until the mixture is frothy
. Remove the lid, fill the shaker with ice, and then cover and shake vigorously again until very cold.
into a 6-ounce footed highball
or rocks glass. Drop 2 to 3 drops of the bitters onto the top of the foamy drink and use a toothpick to swirl the bitters into a yin/yang formation. Serve immediately.