The Whiskey Sour is a classic cocktail that was first published in The Bartender's Guide by Jerry Thomas in 1862. It's a simple drink that is traditionally made with bourbon, citrus, simple syrup, bitters, egg white, and cherries, which has become a go-to template for modern cocktail variations.
Add bourbon, simple syrup, orange bitters, and lemon juice to a shaker.
Fill shaker with cubed ice.
Shake for 10-20 seconds.
Using tongs, remove ice from shaker.
Dry shake for 5-10 more seconds to emulsify egg.
Using a Hawthorne strainer, strain into a sour glass.
Garnish with cherry.