Iced hibiscus cooler
Tastes like cranberry. Costs about eight cents a glass.
Dried hibiscus makes a drink the colour of red wine and about as sour as cranberry juice, for pennies. It is caffeine-free, so it works in the evening, and it is the best-looking thing on this list by a distance.
It is also the only recipe here with a genuine, replicated effect behind it — a modest reduction in blood pressure. Modest is doing real work in that sentence; see the note below rather than the headlines.
How to make it
- Hands on
- 5 min
- Total
- 8 h 5 min
- Makes
- 4 servings
- Per glass
- 2 kcal
Ingredients
Method
-
Cold brew it
Put the hibiscus and cold water in a jug and refrigerate for 8 hours or overnight. Cold brewing gives a cleaner, less astringent drink than boiling does.
-
Strain properly
Strain through a fine sieve. Hibiscus breaks into small fragments that are unpleasant to drink.
-
Sweeten to taste
It is genuinely sour on its own. A teaspoon of honey across the whole jug takes the edge off without making it a soft drink.
-
Serve
Over plenty of ice, with lime. It keeps for three days.
Worth knowing
- Buy it as dried flowers from a Middle Eastern or Caribbean grocer rather than as teabags — a fraction of the price for the same thing.
- In a hurry, brew it hot with half the water and top up with cold. It will be more astringent.
What it actually does for you
- Calories
- 2 kcal
Nutritionally almost nothing — a couple of calories and trace minerals. Its interest is elsewhere: hibiscus is one of the few drinks with repeated trial evidence for lowering blood pressure, typically by a few mmHg systolic over several weeks of daily drinking. That is a real effect and a small one, nowhere near a substitute for medication.
How this was worked out: Brewed hibiscus infusion is essentially water with plant polyphenols; the 2 kcal per glass is from the trace sugars in the dried flowers. Honey, if used, adds about 5 kcal per glass at 1 tsp across the jug (USDA FoodData Central).
Variations
- Add a cinnamon stick and a few cloves while it brews for the Mexican agua de jamaica version.
- Top with sparkling water in the glass.
- Add fresh mint for the last hour of brewing.
Making it is the easy part
Remembering to drink it is the hard part. Honk watches your webcam with on-device AI and honks until you do, as gently or as loudly as you like.
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Does hibiscus tea lower blood pressure?
Somewhat, and this is one of the better-supported claims about any herbal drink. Meta-analyses of randomised trials find average reductions of roughly 7 mmHg systolic and 3 mmHg diastolic with daily consumption over several weeks. That is worth having and it is not a treatment — if you take blood-pressure medication, mention it to your doctor rather than substituting.
Is hibiscus safe in pregnancy?
The usual advice is to avoid it. Hibiscus has traditional use as an emmenagogue and the safety data in pregnancy is thin, so most guidance errs on the side of caution. Chamomile or plain infused water is the easy substitute.
Why is mine cloudy?
Fine flower fragments got through the sieve. Strain it a second time through a coffee filter or a piece of muslin and it will clear.
