
Few cocktails hit the sweet-tart balance quite like this classic, and the good news is every single ingredient here is naturally free of gluten — no swaps or substitutions needed. Bourbon, fresh lemon juice, and simple syrup are the backbone, and none of them bring any wheat, barley, or rye into the picture beyond what's already distilled away. The real star move is the pasteurized egg white, which gets a dry shake before the ice goes in, building that gorgeous, cloud-like foam that sits on top of the finished drink. Two rounds of shaking — first without ice to emulsify, then with ice to chill — is the technique that separates a truly silky whiskey sour from a flat, forgettable one. Straining through a fine-mesh strainer keeps the texture smooth and the foam intact, so your presentation looks like something straight off a cocktail bar menu. A curl of lemon peel or a maraschino cherry on top is optional, but it adds that little finishing touch that makes the whole thing feel special. Whether you're mixing for a crowd or just treating yourself on a weeknight, this is the kind of drink that's effortlessly impressive.
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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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