A Boston Sour is a whiskey-based sour cocktail that combines bourbon, rye, or blended whiskey with fresh lemon juice, powdered sugar, and egg white to create a smooth, velvety texture with a balanced tart and sweet profile.
Recipe Source
View original recipeFrom Mr. Boston Drinks · by Old Mr. Boston De Luxe Official Bartender's Guide
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Shake well with cracked ice and strain into 8 oz.
highball glass.
Then add cube of ice, fill with carbonated water and decorate with half-slice of lemon and a cherry.
Cocktails are served immediately and not stored. Prepare fresh to order.
cocktail shaker · jigger or measuring spoon · coupe glass or cocktail glass · bar spoon or mixing spoon
Yes. Omit the egg white for a thinner, less silky texture. The drink will still taste balanced but will lack the creamy mouthfeel.
Bourbon, rye, Canadian, or blended whiskey all work. Choose based on flavor preference—rye adds spice, bourbon adds sweetness, and blended whiskey offers balance.
Dry shake (without ice) first for 10-15 seconds to emulsify the egg white, then add ice and shake vigorously for another 10-15 seconds. Strain into a glass.
Use pasteurized eggs or pasteurized egg white products to reduce food safety risk if you have concerns.
Yes. Scale all ingredients proportionally: 2 oz whiskey, 0.5 oz fresh lemon juice, 1 tsp powdered sugar, 1 egg white per drink.
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