Pisco Sour

• 2 oz. Pisco
• 1 1/2 oz. lemon juice
• 1/2 oz. sugar syrup
• 1 egg white (for 2 drinks)
• Several dashes Angostura bitters
• Ice

Mix all ingredients, with the exception of the Angostura, with ice in a shaker. Strain into a chilled whiskey sour glass. Top with several dashes of Angostura bitters.