Luk Chup (Thai Fruit-Shaped Mung Bean Sweets)
Why this recipe works
- Recognisable technique: Cooked mung beans are turned into a pliable sweet paste, then shaped, painted and glazed for the classic luk chup appearance.
- Smooth centre: Blending the beans while warm helps create a fine, cohesive paste without graininess.
- Balanced richness: Coconut milk gives the paste body and richness, while a small amount of salt keeps the sweetness from tasting flat.
- Good for preparing ahead: The sweets need chilling to set properly and store well in the fridge, making them suitable for advance preparation.
Get the most out of this recipe
Timing notes
- Chill between stages: Brief chilling helps the shaped paste firm up before painting and gives the colour time to settle before glazing.
- Serve cool: Luk chup are best served chilled or cool so the agar coating stays glossy and the paste keeps its shape.
Texture tips
- For a finer paste: Blend thoroughly while the mung beans are still warm, scraping down the blender until no coarse pieces remain.
- Cook to a shaping consistency: The paste should pull away from the pan and hold its shape; if it feels sticky, chill it before shaping.
- Avoid graininess: Drain the beans well before blending so the mixture thickens evenly rather than becoming loose and difficult to cook down.
Ingredient notes
- Use hulled split mung beans: Hulled split mung beans give the paste a pale colour and smooth texture, which makes painting easier.
- Full-fat coconut milk: Full-fat coconut milk gives the filling a richer texture and helps the paste feel cohesive once cooked.
- Agar glaze: Agar sets quickly as it cools, so keep the glaze warm and fluid while dipping for an even, clear coating.
Make-ahead tips
- Make ahead: The finished sweets can be stored covered in the fridge for up to 4 days.
- Protect the glaze: Store them in a single layer where possible so the glossy surface is not marked.
- Keep chilled for serving: If taking them elsewhere, keep the sweets cold and covered until shortly before serving.
Equipment you'll need
Ingredients
Mung bean paste
Colouring and glaze
Instructions
- Rinse the mung beans in a colander until the water runs mostly clear. Tip into a large pot, cover with plenty of water, and add the pandan leaves. Bring to the boil, then reduce to a steady simmer.
- Simmer the beans for 25 to 35 minutes until very soft and starting to break down when pressed. Top up with a little water if needed so the beans stay submerged. Drain well and discard the pandan leaves.
- While the beans are still warm, blend them with the coconut milk, the larger amount of caster sugar, and the fine sea salt until completely smooth. Scrape down the blender as needed so there are no grainy bits. The mixture should look like a thick, glossy purée.
- Tip the purée into a saucepan and cook over low heat, stirring constantly, until it thickens into a paste that pulls away from the pan and holds its shape. Keep the heat gentle so it does not catch on the bottom. This usually takes 15 to 20 minutes.
- Spread the paste in a mixing bowl and leave until cool enough to handle. Cover the surface closely with a clean piece of baking paper if you have it, to prevent a skin forming. Once cool, the paste should be firm but pliable.
- Pinch off small portions and shape into tiny fruits and vegetables, keeping the pieces similar in size so they glaze evenly. Place them on a tray and chill briefly so the shapes firm up. If the paste feels sticky, chill a little longer before painting.
- Put a few drops of liquid food coloring into separate small bowls and dilute each with a few drops of water to make paint-like colours. Use a pastry brush to paint the chilled shapes, building colour in thin layers rather than flooding the surface. Chill again for 10 minutes to set the colouring.
- Make the glaze: whisk the dried agar-agar and the smaller amount of caster sugar into the water in a saucepan. Bring to the boil, then simmer for 2 minutes, stirring, until fully dissolved and clear. Keep the glaze warm on the lowest heat so it stays liquid.
- Working in batches, dip each painted sweet into the warm agar glaze, lift out, and let the excess drip back into the pan. Set on a tray to dry for a minute, then dip a second time for a glossier finish. If the glaze starts to set, rewarm gently until fluid again.
- Chill the glazed luk chup for 20 to 30 minutes until the coating is fully set and glossy. Serve cold or cool, straight from the fridge. Keep them covered so the surface stays shiny.
Recipe notes
Tips
- For the smoothest paste, blend while the beans are still warm, then cook the purée slowly until it becomes a cohesive paste that no longer feels wet.
- Agar sets quickly as it cools, so keep the glaze on very low heat and dip in small batches for an even, clear coating.
- If serving to young children, older adults, or anyone who is immunocompromised, use food colouring and ingredients from reputable sources and keep the sweets chilled; discard any that have been left at room temperature for more than 2 hours.
Substitutions
- Replace pandan leaves with 1 tsp vanilla extract for a different aroma, adding it when blending the mung beans with the coconut milk.
- Replace caster sugar with coconut sugar for a deeper caramel note, keeping the same amounts in both the paste and the glaze.
Storage
- Refrigerate up to 4 days
- Store in an airtight container in the fridge, ideally in a single layer so the glaze stays glossy. Serve chilled; if condensation forms, leave uncovered in the fridge for 10 minutes to dry the surface.
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Recipe overview
- Servings: 24 pieces
- Yield: fruit-shaped sweets
- Total time: 2h 30min (1h 20min active)
- Difficulty: Advanced
- Cuisine: Thai
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