This cocktail seems to be created in the late 19th century, and both Peru and Chile claim to be its inventor. One thing is certain: it is the world's most popular non-French cocktail based around Brandy (Cognac or Armagnac).
Pour all ingredients, except the bitters, in a shaker. Fill with ice and shake vigorously for 10 seconds. Strain into a martini glass and place the dashes of bitters on the foam created by the egg white. You can also draw patterns with the bitters marks, using a toothpick.
Alcohol abuse is bad for your health, please consume in moderation.