
Bright, tangy, and just sweet enough, this pineapple shrub is the kind of homemade drinking vinegar that makes plain sparkling water feel like a serious craft cocktail. Fresh pineapple chunks are coaxed with sugar until they release their juice, then finished with apple cider vinegar and a pinch of kosher salt for a concentrate that's complex and refreshing in equal measure. The whole thing comes together on the stovetop with four simple ingredients — no specialty products, no hidden additives, and absolutely nothing to second-guess on a label. That matters when you're navigating a diet that requires careful attention to what's lurking in packaged drinks and flavored mixers, which can be surprisingly tricky to vet. After a 24-hour rest in the fridge, the flavors mellow and deepen into something genuinely special. Just splash a couple tablespoons over ice, top with sparkling water, and you've got a drink that tastes like it came from a fancy cocktail bar — made entirely in your own kitchen.
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Combine the pineapple chunks and sugar in a medium saucepan. Stir to coat the fruit, then let the mixture sit at room temperature for 10 minutes until the sugar begins to dissolve and the pineapple releases some juice.
Place the saucepan over medium heat and cook, stirring occasionally, until the sugar is fully dissolved and the mixture just comes to a gentle simmer, about 3–5 minutes. Remove from heat immediately — do not boil vigorously.
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