Bua Loy (บัวลอย)

The Dessert Named After Floating

บัวลอย — "floating lotus" — is named for the moment the rice balls rise to the surface of the boiling water. It's the Thai dessert built on one humble ingredient: แป้งข้าวเหนียว, glutinous rice flour, kneaded with water and coloured with whatever the kitchen has — steamed taro for purple, pumpkin for yellow, pandan water for green. No filling, no gimmick; the balls are the dessert, carried by the coconut milk.

The Kapook source's classic is บัวลอยไข่หวาน — the version with a sweet egg. The egg is poached directly in the sweetened coconut milk until it sets soft, then served whole on the bowl, so the yolk breaks into the dessert like a sauce. The coconut milk itself is barely cooked — sugar and salt dissolved in, one boil, off the heat — because boiling coconut milk for long splits it.

The cooking order matters, and the source is explicit: the balls are boiled in plain water, colour by colour, and only dressed with the coconut milk in the bowl. Boiling them in the coconut milk would cloud it with starch. Then the discipline of the name — the balls are ready when they float.

The Recipe (serves 2–3 — Kapook's bua loy kai wan)

No taro or pumpkin handy? The source says food colouring works — the natural colourings are preferred, not required. Aroifin's 5-colour version adds two more natural colours to the same dough and coconut-milk base.

The Method

1. Three doughs. Divide the flour in three. Knead one with mashed taro and a little water, one with pumpkin and water, one with pandan water — three coloured doughs. Roll small balls, dust lightly with glutinous rice flour.
2. Sweeten the milk. Coconut milk, sugar and salt in a pot, stir until dissolved, bring just to the boil, off the heat.
3. Boil the balls. Plain water at a rolling boil, colour by colour, until the balls float. Drain, divide into bowls.
4. Dress. Pour the sweet coconut milk over.
5. The sweet egg. Crack each egg into the warm coconut milk and poach until set to your liking; one per bowl. Serve warm.

Where Thai Sources Disagree

How Western Versions Get It Wrong

• Using wheat or tapioca flour. The balls are glutinous rice flour — the chew is the point. Wheat flour makes dumplings, not bua loy.
• Boiling the balls in the coconut milk. The starch clouds the milk and the dessert turns gluey. Plain water first, coconut milk after.
• Boiling the coconut milk long. One boil, off the heat. Long boiling splits coconut milk.
• Calling it mochi. Bua loy balls are unfilled and served in a warm sweet broth — a dessert soup, not a wrapped sweet.
• Skipping the salt. The teaspoon of salt in the coconut milk is what stops the dessert tasting flat.

UK Ingredient Notes

• Glutinous rice flour: Thai grocers or the Chinese aisle (labelled "glutinous rice flour" or "sweet rice flour" — not rice flour).
• Pandan water: frozen pandan leaves at Thai grocers, or bottled pandan essence.
• Taro and pumpkin: standard supermarkets; steam and mash.
• Coconut milk: tinned, full-fat — light coconut milk thins the dessert.
• Serve warm, not chilled — the coconut milk sets unpleasantly in the fridge.

Sources

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