Add bourbon, sour mix, and egg white to a cocktail shaker and shake vigorously for 15 seconds.

Pour into an old fashioned cocktail glass and garnish with a brandied maraschino cherry.

Expert Tip: This cocktail is made with a dry shake (no ice), and after the initial shake, you add ice and shake vigorously for an additional 15 seconds to chill the drink. This is what allows the egg white to foam and add a creaminess to the cocktail.