The Boston Sour is a smooth, velvety whiskey cocktail built on Old Mr. Boston blended whiskey, fresh lemon juice, and whipped egg white for a silky texture. Its balance of citrus and sweetness makes it a refined classic.
Recipe Source
Visit Mr. Boston DrinksFrom Mr. Boston Drinks · by Mr. Boston Deluxe Official Bartender's Guide
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Shake with cracked ice and strain into sour glass.
Add slice of lemon and a cherry.
cocktail shaker · jigger · fine mesh strainer
Yes, omit the egg white for a standard whiskey sour, but you'll lose the signature silky texture and foam head that define the Boston Sour.
Dry shake the egg white with lemon juice and powdered sugar for 10–15 seconds without ice to aerate it, then add ice and whiskey and shake again before straining.
Any blended or bourbon whiskey works; use a 2 oz pour of similar proof for consistent flavor.
It's balanced—the powdered sugar and egg white add sweetness and body, while fresh lemon juice provides bright acidity.
No; mix and serve immediately to preserve the foam and prevent the egg white from breaking down.
