The Boston Sour is a classic whiskey cocktail that combines blended whiskey, fresh lemon juice, and powdered sugar with egg white to create a smooth, silky drink topped with foam.
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Shake with cracked ice and strain into sour glass.
Add a slice of lemon and a cherry.
cocktail shaker · jigger · coupe or sour glass · citrus juicer
Yes, omit the egg white for a lighter version, though you'll lose the signature silky texture and foam top.
Yes, shake vigorously for 12-15 seconds to properly emulsify the egg white and create a dense foam.
Powdered sugar dissolves quickly when shaken cold and creates a slightly different mouthfeel than simple syrup, giving the Boston Sour its traditional texture.
Use Old Thompson Blended Whiskey as specified; it's a lower-proof, approachable blended whiskey that balances well with the citrus and egg white.
Juice the lemon immediately before making the drink and strain out pulp; fresh juice is essential for bright flavor.
