
This cocktail is everything a classic sour should be — bright, boozy, and beautifully frothy, with a depth of sweetness that feels a little more interesting than the standard version. Pure maple syrup steps in as the sweetener here, which means there's no honey involved at any stage, making it a genuinely safe pour for anyone avoiding it. The combination of bourbon and fresh lemon juice creates that perfect push-pull of warm and tart, while the maple rounds everything out with a subtle, earthy richness you just can't fake with simple syrup. The dry shake technique with pasteurized egg white is the secret to that silky, cloud-like foam that sits on top — it looks like something a bartender spent years perfecting, but it's completely doable at home. A few dashes of Angostura bitters dotted across the foam add a gorgeous visual finish and a gentle spiced note that ties the whole drink together. Whether you're hosting or just treating yourself on a weeknight, this is the kind of cocktail that makes people ask for the recipe before they've even finished the glass.
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Combine the bourbon, lemon juice, maple syrup, and pasteurized egg white in a cocktail shaker without ice. Seal and shake vigorously for 15 seconds, until the mixture is frothy and slightly opaque.
Add a generous handful of ice to the shaker. Seal and shake again for another 10–12 seconds, until the outside of the shaker is very cold to the touch.
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