
Bright, citrusy, and endlessly refreshing, this homemade sparkling drink is the kind of thing that makes you wonder why you ever reached for a can. A simple grapefruit syrup ā made by gently simmering sugar, water, fresh grapefruit juice, and zest ā gives the whole thing a depth of flavor that no store-bought version can match. Letting the zest steep after the heat is off is the secret move here, coaxing out every bit of that fragrant, slightly bitter citrus oil before you strain it away. Once you stir the syrup into chilled sparkling water, you get a drink that's lightly sweet, tangy, and beautifully fizzy. Store-bought flavored sparkling waters and sodas can be surprisingly tricky to vet for hidden additives, but this one is made entirely from scratch with ingredients you can see and trust. Serve it over ice with a grapefruit wedge on the rim and it looks as good as it tastes ā perfect for a lazy afternoon or as a crowd-pleasing mocktail at any gathering.
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Combine the sugar, water, grapefruit zest, and grapefruit juice in a small saucepan over medium heat, stirring until the sugar is fully dissolved, about 3ā4 minutes. Do not boil.
Remove from heat and let the syrup steep for 15ā20 minutes, until cooled to room temperature and the zest flavor has infused.
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