Nam Krajiab (น้ำกระเจี๊ยบ)

The Drink That Shares Its Name With A Vegetable

Say กระเจี๊ยบ to a Thai cook and they will ask which one: the green one — okra (กระเจี๊ยบเขียว), a vegetable — or the red one — roselle (กระเจี๊ยบแดง), whose fleshy calyxes make this drink. Kapook's gloss for the flower is exactly the family you already know: Jamaica sorrel, roselle — the same Hibiscus sabdariffa behind agua de Jamaica and "hibiscus tea". Thais make it far stronger and serve it cold, so the drink is often called น้ำกระเจี๊ยบแดง to leave no doubt.

The drink is a market staple. Bottled versions stand in ice tubs beside lemongrass tea and chrysanthemum, and the Thai sources here split neatly between the home pot and the selling pot — TrueID's recipe is framed as a bottled "career drink" at 5 litres, Zomzaa's works out costings per 250 ml bottle. At home it is barely a recipe: calyxes, water, sugar, salt, and a pot.

It is also one of the drinks Thais reach for on purpose, not just for pleasure — the Wongnai cook whose recipe we cite started brewing it after a family health check flagged high blood pressure, and drinks it warm in the morning. Kapook, for its part, warns the drink is a diuretic and that litres of it every day, for a long time, can be too much of a good thing. One glass of something this tart rarely needs justifying either way.

The Recipe (plain version, from Kapook)

The pandan pot (Cookpad): 15 dried flowers to 1.5 litres of water with a knotted pandan leaf; the pot comes off the heat when the flowers turn translucent, and sugar and ½ tsp salt are stirred in after the drink cools. The fresh-flower pot (Sanook): 2 cups of bright red fresh calyxes, stripped from their seeds, 2 litres of water, ½ cup sugar and a pinch of salt — boiled gently 10–15 minutes, with a few dried flowers thrown in for a deeper colour. The selling pot (TrueID): 50 g dried calyxes to 5 litres, 500 g sugar, 1 tsp salt, boiled 20 minutes and bottled. The bottle counter (Zomzaa): 30 g dried (or fresh) calyxes, 200 g sugar, ¼ tsp salt — six 250 ml bottles. The morning cup (Wongnai): a handful of dried flowers simmered 20 minutes, strained, then reheated with sugar and drunk warm.

The Method

1. The rinse. Wash the dried calyxes quickly to lift off dust. Kapook is explicit: do not soak them — soaking before boiling drains both flavour and nutrients. A quick swish and drain is all they need.
2. The simmer. Bring the water to a rolling boil, add the calyxes and turn down to a simmer. About 15 minutes does it — the water goes deep ruby and the calyxes turn soft and pale. Most sources time 20 minutes; Cookpad instead watches for the flowers to go translucent.
3. The seasoning. Stir in the sugar and salt while the liquid is hot, until dissolved, then taste. The salt is not optional garnish — every Thai source salts the drink, and it is what rounds the tartness into something you want another glass of.
4. The strain. Pour through a sieve and press the calyxes lightly; discard them. Some cooks re-boil the strained liquid briefly with the sugar, but dissolving in the hot liquid does the same job.
5. The chill. Cool, then bottle and refrigerate, or pour straight over ice. Cookpad serves it over ice immediately or bottles it for the evening; TrueID chills the bottles in a cold-water bath. It keeps a few days in the fridge.

Where Thai Sources Disagree

How Western Versions Get It Wrong

• Okra. กระเจี๊ยบ is a shared name: the drink is made from red roselle (กระเจี๊ยบแดง, Hibiscus sabdariffa), never from green okra (กระเจี๊ยบเขียว). "Okra juice" recipes circulating in English are slimy green water — nothing to do with this drink.
• Hibiscus tea bags. Pre-bagged hibiscus tea brews a pale pink tisane. Nam krajiab wants whole dried calyxes boiled until the water is nearly opaque ruby — the colour is the recipe.
• Leaving out the salt. Every one of our six Thai sources salts the drink. Unsalted, the tartness is thin and sharp; a pinch rounds it into the market-bottle flavour.
• Soaking the calyxes first. Kapook warns specifically against a pre-soak: it drains flavour and nutrients into the soaking water. Rinse, don't soak.
• Serving it weak. The Thai drink is concentrated — brewed strong, sweetened, then diluted only by ice. A pale, lightly steeped infusion served hot is hibiscus tea, which Kapook treats as a separate drink made by dry-roasting the flowers.

UK Ingredient Notes

• Dried roselle calyxes: sold as "dried hibiscus flowers", "hibiscus sabdariffa" or "flor de Jamaica" at Thai grocers, health-food shops and online — whole calyxes, not tea bags.
• Fresh roselle is rare in the UK; the dried calyxes are the standard route and every source agrees they make the proper drink.
• Sugar: white granulated, or light brown sugar if you want the TrueID temple-pot roundness.
• Salt: fine table salt; start at a pinch per litre and taste.
• The finished drink keeps 2–3 days refrigerated in bottles; serve over plenty of ice. Kapook's note is worth heeding — it is a diuretic, so treat it as a treat rather than a water replacement.

Sources

This recipe is translated from the following Thai-language sources. Where they disagree, we've said so.