
A well-made whiskey sour is one of those cocktails that feels both classic and a little luxurious, and this version absolutely delivers on that promise. The secret weapon here is pure maple syrup, which steps in as the sweetener and brings a warm, caramel-edged depth that you simply cannot get from a bottle of premixed sour mix loaded with corn syrup. That swap matters more than you might think — most bar-ready sweet-and-sour blends are packed with high fructose corn syrup, which means making this one at home puts you fully in control of what's going into your glass. The pasteurized egg white is what gives this cocktail its signature silky foam on top, creating that beautiful layered look when you strain it slowly into the glass. Fresh lemon juice keeps everything bright and tart, balancing the richness of the bourbon and the gentle sweetness of the maple. A few dashes of Angostura bitters dotted across the foam add a subtle aromatic complexity and make the presentation look genuinely stunning. It's the kind of drink that impresses guests without requiring any bartending experience beyond a good hard shake.
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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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