
Bright, tangy, and just sweet enough, this pineapple shrub is a drinking vinegar concentrate that transforms a glass of sparkling water into something genuinely special. Fresh pineapple chunks are coaxed with sugar over gentle heat until the fruit releases its juice, then apple cider vinegar and a pinch of kosher salt pull everything into sharp, complex balance. The whole recipe is built from four clean, simple ingredients — nothing processed, nothing hidden — so it's naturally free of wheat without any substitutions or workarounds required. After a 24-hour rest in the fridge, the flavors mellow and deepen into a syrup that tastes far more sophisticated than the effort involved. Stirred into sparkling water over ice, it delivers a refreshing, slightly funky sip that feels like something you'd pay too much for at a craft cocktail bar. It keeps for up to four weeks in the refrigerator, which means you can batch it once and enjoy it all month long.
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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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