Bubur sumsum is an Indonesian coconut-rice-flour pudding, especially familiar in Java, served warm or cool with a fragrant palm sugar syrup. Its gentle, creamy texture and sweet, slightly smoky sauce make it an easy dessert to prepare with a saucepan and a whisk; recipes vary by household, including whether they use pandan.
Ingredients
- For the pudding: 1 cup (160 g) rice flour
- 4 cups (960 ml) unsweetened coconut milk, well stirred
- 1 cup (240 ml) water
- ½ teaspoon (3 g) fine salt
- 1 pandan leaf, tied in a loose knot, or ¼ teaspoon pandan extract (optional)
- For the palm sugar syrup: 1 cup (180 g) finely chopped Indonesian palm sugar, such as gula jawa
- ½ cup (120 ml) water
- 1 pandan leaf, tied in a loose knot (optional)
Instructions
- Prepare the syrup ingredients. Chop the palm sugar into small pieces so it melts evenly. If it is sold in a firm block, use a sturdy knife and take care while cutting. Measure the water and set the optional pandan leaf aside. The syrup can be made first and kept warm while you cook the pudding.
- Simmer the palm sugar syrup. Put the chopped palm sugar, ½ cup (120 ml) water, and, if using, one knotted pandan leaf in a small saucepan. Warm over medium heat, stirring until the sugar dissolves. Bring it to a gentle simmer and cook for about 8 minutes, stirring occasionally, until the syrup looks glossy and lightly thickened. It will thicken a little more as it cools. Remove the pandan leaf. If you see grit or fibrous bits, pour the syrup through a fine sieve into a heatproof cup. Set aside; rewarm gently if it becomes too thick.
- Make a smooth rice-flour slurry. In a medium bowl, whisk the rice flour with about 1 cup (240 ml) of the coconut milk until no dry pockets or lumps remain. Whisk in the measured water. Starting with cool liquid makes it easier to disperse the flour before it reaches the heat. Set the remaining coconut milk by the stove.
- Heat the coconut milk. Pour the remaining 3 cups (720 ml) coconut milk into a medium, heavy-based saucepan. Add the salt and the second pandan leaf, if using. Warm over medium heat, stirring now and then, until steaming but not boiling vigorously. A gentle simmer is enough; boiling hard can make the coconut milk separate or catch on the bottom.
- Cook the pudding slowly. Whisk the rice-flour slurry once more, then pour it into the hot coconut milk in a steady stream while whisking constantly. Lower the heat to medium-low. Keep whisking and scrape across the bottom and into the corners of the pan as the mixture thickens. Cook for 15–17 minutes, or until it is very smooth, glossy, and thick enough to fall from a spoon in a slow ribbon. If it starts to bubble or stick, reduce the heat and keep stirring. Remove the pandan leaf.
- Check the texture and serve. The pudding should be thick but spoonable, not a firm sliceable paste. If it has become too thick, whisk in hot water a tablespoon (15 ml) at a time until it loosens. Divide among six small bowls and spoon palm sugar syrup over each portion. Serve warm, or let the bowls cool before chilling them for a cold dessert.
Tips
- Whisk the flour cold first. Rice flour can form stubborn lumps if it goes straight into hot coconut milk. Make a smooth slurry, whisk it again just before adding it, and pour it in gradually while stirring.
- Keep the heat moderate. A thick pudding can scorch quickly, especially near the end. Use a heavy saucepan if you have one, keep the whisk moving over the base, and turn the heat down as soon as the mixture thickens.
- Choose the right coconut milk. Use unsweetened canned or carton coconut milk, not sweetened coconut cream or a ready-to-drink coconut beverage. Canned milk gives the richest result. If it is very thick, whisk it thoroughly before measuring so the fat and liquid are evenly combined.
- Adjust sweetness at the table. Palm sugars vary in sweetness and intensity. Keep the syrup separate until serving, then add as much as you like. If your syrup becomes too thick, stir in a teaspoon of hot water at a time; if it is thin, simmer it briefly longer.
Serving Suggestions
Serve bubur sumsum in small bowls with the syrup poured over the top or offered in a little pitcher. The pudding itself is mild, so the dark, fragrant syrup supplies most of the sweetness. For a pretty finish, drizzle it in a spiral and leave some pale pudding visible rather than stirring everything together. A small pinch of toasted sesame seeds or unsweetened shredded coconut can add texture, though neither is required for the classic simple presentation.
The pudding is pleasant warm just after cooking, when it is soft and especially creamy. It is also good chilled, with the syrup added only when the bowls reach the table. For a fuller Indonesian-style snack spread, serve modest portions alongside fresh fruit or a cup of unsweetened tea. Because the dessert is rich, small servings are usually satisfying; you can always offer extra syrup separately for anyone who prefers a sweeter bowl.
Variations
Without pandan: Leave out the leaf or extract. The pudding and syrup will still work, with a simpler coconut and palm sugar flavor. Pandan leaves can be hard to find outside Asian grocers; frozen leaves are a useful option. If using pandan extract instead, add only a few drops to the pudding or syrup because extracts vary in strength and can taste artificial when overused.
With brown sugar: If Indonesian palm sugar (gula jawa) is unavailable, use an equal weight of dark brown sugar. The syrup will be sweeter and less complex, without palm sugar’s characteristic caramel-like, earthy notes. A small piece of coconut sugar is another reasonable substitute if it is available, but check its sweetness as products differ.
More or less rich: For a lighter pudding, replace up to 1 cup (240 ml) of the coconut milk with water. The result will be less creamy, so keep the salt and rice flour the same and judge the thickness near the end. For a thicker, richer texture, use a little less water in the slurry, but do not reduce the liquid too much or the pudding may set overly firm as it cools.
Make it ahead: Cook the pudding and syrup separately, cool them promptly, and refrigerate. The pudding firms when cold, which is normal. Reheat it gently with a splash of water or coconut milk and whisk until smooth, or serve it chilled with the syrup spooned over just before eating.
Storage and Reheating
Cool the pudding and syrup in separate covered containers and refrigerate them within 2 hours of cooking. The pudding keeps for 3–4 days in the refrigerator; the syrup also keeps refrigerated for up to 4 days. Separate storage helps the pudding retain its mild flavor and lets you control the amount of syrup in each serving. Do not leave the finished dessert at room temperature for more than 2 hours.
For warm leftovers, transfer one portion to a small saucepan and reheat over low heat, stirring frequently. Add water or coconut milk a tablespoon (15 ml) at a time until it is creamy again. You can also microwave a serving in a microwave-safe bowl in short intervals, stirring between each interval to distribute the heat. Reheat leftovers to 165°F (74°C), as recommended by USDA FSIS, and avoid repeatedly warming and cooling the same batch. Warm the syrup separately over low heat, adding a little water if needed. Chilled pudding can be eaten straight from the refrigerator without reheating.
Frequently Asked Questions
Is rice flour the same as glutinous rice flour?
No. This recipe calls for ordinary rice flour, made from regular rice. Glutinous rice flour is made from sticky rice and produces a different, much more elastic texture. Check the package label before buying, since both types are often stocked near one another.
Can I use a different flour?
Rice flour gives bubur sumsum its characteristic smooth, soft set, so another flour will change the result. Cornstarch can thicken the liquid, but it creates a more custard-like texture and is not a direct one-for-one substitute by volume. For the most reliable result, use rice flour and make the slurry carefully to prevent lumps.
Why did my pudding turn lumpy?
The flour may not have been fully whisked into cool liquid, or the slurry may have been added too quickly to hot coconut milk. If small lumps appear, take the pan off the heat and whisk vigorously. For a smoother finish, carefully pass the cooked pudding through a sieve while it is still hot; return it to low heat briefly if it needs to thicken again.
Can I make the pudding ahead and serve it cold?
Yes. Chill it in covered individual bowls or one shallow container after cooling it promptly. It will become firmer in the refrigerator, so either serve it as a soft chilled pudding or whisk in a little coconut milk before portioning if you prefer a looser texture. Add the syrup at serving time.
My palm sugar syrup is grainy. How can I fix it?
Keep it over low heat and stir until the sugar dissolves fully. If it remains gritty, strain it through a fine sieve. Palm sugar can contain small fibers or particles, especially when cut from a traditional block. Avoid boiling the syrup hard for a long time, which can make it overly thick and sticky.
Can I make the recipe dairy-free?
It is naturally dairy-free when made with coconut milk and water. Check the ingredient label on packaged coconut milk and palm sugar if you need to avoid a particular additive or cross-contact. Do not substitute dairy milk for the coconut milk if you want the familiar coconut flavor and texture.
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