
Bright, tangy, and just a little bit addictive, this pineapple shrub is the kind of homemade drinking vinegar that turns a plain glass of sparkling water into something genuinely special. Fresh pineapple chunks are coaxed with sugar and apple cider vinegar into a concentrated syrup that's fruity, acidic, and deeply refreshing. The process is surprisingly simple — a gentle simmer, a long rest in the fridge, and a quick strain — but the result tastes like something you'd pay too much for at a craft cocktail bar. Because it's built from just four clean ingredients, there's zero guesswork about hidden additives or allergen cross-contact that can sneak into store-bought mixers and flavored syrups. A batch keeps in the refrigerator for up to four weeks, so you can splash it into sparkling water whenever the mood strikes. It also works beautifully as a cocktail mixer or a base for mocktails when you want something a little more interesting than juice.
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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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