
A well-made whiskey sour is one of those cocktails that feels both classic and a little bit fancy, and this version delivers every time. The secret to that gorgeous, velvety foam on top is the pasteurized egg white — a two-stage shake technique first builds the froth, then a hard shake over ice chills everything to perfection. Simple syrup made from scratch is the move here, because so many bottled cocktail mixers and pre-made sour mixes are loaded with high fructose corn syrup that throws off both the flavor and your ingredient standards. Fresh lemon juice keeps things bright and tart without any of the artificial sweeteners hiding in commercial alternatives. The result is a beautifully balanced drink — boozy, citrusy, and silky smooth — that you can feel good about pouring. Garnish with a curl of lemon peel for elegance or a cherry for a little retro charm, and you've got a bar-quality cocktail made entirely on your own terms.
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Combine the bourbon, lemon juice, simple syrup, and pasteurized egg white in a cocktail shaker without ice. Seal and shake vigorously for 15 seconds, until the mixture is foamy.
Add a generous handful of ice to the shaker, seal, and shake again for another 10–15 seconds, until the outside of the shaker is very cold.
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