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Ingredients (makes ~400ml syrup)
- 30g (1 oz) dried hibiscus flowers (flor de Jamaica — available at Latin markets, tea shops, Amazon)
- 300g (1½ cups) white sugar
- 400ml (1⅔ cups) water
- Juice of 2 limes
- ½ tsp rose water (optional — enhances floral character)
- ¼ tsp citric acid
Method
- Combine hibiscus flowers, sugar, and water. Bring to a gentle simmer over medium heat, stirring until sugar dissolves.
- Simmer 5 minutes. The syrup will turn a deep ruby red — this is the anthocyanin pigment from the hibiscus extracting into the liquid.
- Remove from heat. Cool slightly. Add lime juice, rose water, and citric acid. Stir.
- Strain through fine mesh, pressing hibiscus to extract maximum color and flavor.
- Bottle and refrigerate. Keeps 4 weeks — the citric acid helps preservation.
Making Hibiscus Soda
Add 40–50ml syrup to a glass over ice. Pour 280ml cold sparkling water over it. The color will bloom into the glass beautifully. Standard ratio: 1:7 (hibiscus is tart — less syrup than sweeter sodas).
For a Hibiscus Spritz: use 30ml syrup, 100ml dry white wine, and 150ml sparkling water.
FAQ
Where do I buy dried hibiscus flowers?
Latin/Mexican grocery stores sell them in bulk as "flor de Jamaica" — this is almost always the best price and quality. Natural food stores carry them in the tea or bulk section. Online via Amazon or specialty tea retailers. Avoid tea bags — you want whole dried flowers for maximum color and flavor extraction.
Does hibiscus soda change color with ice or pH?
Yes — this is one of its most interesting properties. Hibiscus anthocyanins are pH-sensitive: in acidic conditions (lime juice, citric acid) the color is bright ruby red. In more alkaline conditions it shifts toward purple. Adding baking soda or alkaline water turns hibiscus soda purple. A fun experiment if you have curious guests.
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