Nam Takrai (น้ำตะไคร้)

The Cooler The Garden Gives Away

น้ำตะไคร้ is the drink made from the herbs every Thai garden grows and nobody buys — which is exactly Kapook's pitch: lemongrass and pandan, planted and forgotten, turned into the day's best cooler in twenty minutes. The recipe is barely a recipe: boil, sweeten, cool, ice.

The technique has two details worth keeping. The lemongrass gets bruised before it goes in — bashed just enough to crack the stalks so the oils release. And the boil runs until the water changes colour — Kapook's home version reads the drink's readiness by the pale green tint, while TrueID's selling version takes it further: a full thirty-minute simmer on medium-low, the herbs pressed under the water, plus the pinch of salt that every batch recipe keeps and every home recipe forgets.

Then there's the herbal-medicine version. Zomzaa's bottled recipe adds mature ginger to the pot — lemongrass and ginger boiled three minutes, pandan for ten more — the warm, spicy trio sold in 250 ml bottles as the health drink. The base is the same water and herbs; only the heat in the throat changes.

The Recipe (home version, from Kapook)

The selling batch (TrueID): 5 L water, 10–15 bruised stalks, 20 pandan leaves, 300 g unrefined sugar, ½ tsp salt — 30-minute simmer, 15 bottles. The ginger trio (Zomzaa): 3 L water, 80 g lemongrass, 50 g mature ginger, 10 g pandan, 100 g brown sugar, 1 tsp salt.

The Method

1. The bruise. Lemongrass bashed to crack the stalks; pandan cut short. Both into the water.
2. The boil. Boil until the water turns pale green and smells of lemongrass; strain the herbs out.
3. The sweeten. Back to the pot, sugar stirred in until dissolved; off the heat; cool completely.
4. The glass. Over ice, lime juice to taste — a squeeze brightens the whole drink.

Where Thai Sources Disagree

How Western Versions Get It Wrong

• Lemongrass tea from a bag. The drink is fresh bruised stalks and pandan simmered into the water — a teabag of lemongrass dust tastes thin and dusty by comparison.
• Skimming the pandan. The pandan isn't optional garnish — it's half the flavour and the source of the pale green colour.
• Boiling it to bitterness. The home version stops when the colour turns; a long violent boil turns the lemongrass bitter.
• Adding milk. This is a clear herbal drink — milk belongs to Thai tea, not nam takrai.
• Skipping the bruising. Whole unbruised stalks release almost nothing. The bruise is the technique.

UK Ingredient Notes

• Lemongrass: fresh stalks from supermarkets and Thai grocers — 3 per litre.
• Pandan leaves: frozen at Thai grocers.
• Unrefined cane sugar: standard supermarkets, for the amber batch version.
• Everything scales linearly — TrueID's 5-litre batch is the same drink at five times the size.

Sources

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