Mezcal Sour

Preparation:

1. Add the mezcal, lemon juice, agave syrup, and egg white to a shaker without ice (dry shake) and shake vigorously for 10 seconds to emulsify.
2. Add plenty of ice to the shaker and shake hard again for another 12-15 seconds until well chilled.
3. Double strain into a pre-chilled Old Fashioned glass or Coupe glass.
4. Garnish with a few drops of Angostura bitters on the foam and add a lemon twist.