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Beverage • American

Perfect Boston Sour Recipe

Whiskey lovers will fall in love with this perfect Boston sour after just one delicious sip! With its wonderfully frothy topping, the classic Boston sour elevates a basic whiskey sour to add a velvety, silky texture for a touch of elegance.

5.0 from 149 votes
5 mins
Total Time
1
drink
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Perfect Boston Sour

How to Make the Best Perfect Boston Sour

The Perfect Boston Sour is a sophisticated whiskey cocktail that takes the classic whiskey sour to the next level with a luxurious frothy egg white topping. This elegant drink features the perfect balance of bourbon whiskey, bright lemon juice, and smooth simple syrup, creating a well-rounded flavor profile that whiskey enthusiasts will absolutely love.

What sets the Boston Sour apart from a standard whiskey sour is the technique—the two-shake method. The initial dry shake without ice helps emulsify the egg white, creating a stable foam. Then, after adding ice for the wet shake, the extended shaking develops that signature creamy, velvety texture that makes each sip truly special.

Whether you’re entertaining guests or treating yourself to an evening cocktail, this Perfect Boston Sour delivers café-quality results at home. The frothy top adds visual appeal and elegance to any cocktail hour, making it the ideal choice when you want something a bit more refined than your everyday drink.

Perfect Boston Sour

Perfect Boston Sour

Whiskey lovers will fall in love with this perfect Boston sour after just one delicious sip! With its wonderfully frothy topping, the classic Boston sour elevates a basic whiskey sour to add a velvety, silky texture for a touch of elegance.

5.0 from 149 votes
CourseBeverage
CuisineAmerican
Keywordboston sour, bourbon sour with egg white, whiskey sour with egg white, cocktails
Prep Time5 mins
Cook Time mins
Total Time5 mins
Servings1 drink
Calories240kcal
AuthorRare Ivy
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Ingredients

Boston Sour

Instructions

Boston Sour

  1. Add whiskey, lemon juice, simple syrup, egg white and bitters to a cocktail shaker with no ice.
  2. Put on the top and shake for 30 seconds. This is our dry shake.
  3. Remove the top and add a handful of ice. Put the top back on and shake again for at least one minute to develop the frothy topping. This is our wet shake.
  4. Strain into a chilled glass.
  5. If desired, garnish with a lemon twist. Enjoy!

Notes

  • The dry shake without ice is crucial for creating the signature frothy texture of a Boston sour.
  • Use fresh lemon juice—bottled juice will not yield the same quality results.
  • A well-made egg white foam creates a velvety mouthfeel and elegant appearance.
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