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Boston Sour

A classic whiskey cocktail with a silky egg white foam, balanced citrus, and smooth bourbon.
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Prep Time 2 minutes
Total Time 5 minutes
Servings: 1 serving
Course: Drinks and Beverages
Cuisine: American
Calories: 140
Ingredients Equipment Method Notes

Ingredients
  

Main
  • 2 ounces bourbon whiskey
  • 0.75 ounces fresh lemon juice
  • 0.5 ounces simple syrup
  • 1 egg white
  • Ice cubes
  • Lemon wheel or twist for garnish

Equipment

  • Cocktail shaker
  • Jigger for measuring
  • Bar spoon
  • Hawthorne strainer
  • Coupe glass or cocktail glass
  • Citrus juicer
  • Small bowl for separating egg white

Method
 

  1. Prepare your ingredients by juicing fresh lemons to yield 0.75 ounces and measuring your bourbon and simple syrup.
  2. Separate the egg white from the yolk in a small bowl, ensuring no yolk is mixed in.
  3. Dry shake the egg white alone in the cocktail shaker for 10 seconds to build foam.
  4. Add 2 ounces bourbon, 0.75 ounces lemon juice, and 0.5 ounces simple syrup to the shaker without removing the foam.
  5. Fill the shaker three-quarters full with ice cubes and seal tightly.
  6. Shake vigorously for 12 to 15 seconds until the shaker is frosty.
  7. Strain the mixture into a chilled coupe or cocktail glass using a Hawthorne strainer to hold back ice.
  8. Garnish with a lemon wheel or twist by expressing the oils over the drink and placing it on top of the foam.

Notes

Serve immediately while the foam layer is still silky and the drink is properly chilled.