Sticky Rice Water Ratio
Short answer: sticky rice takes less water than rice — about 1 part rice to 2/3 part water if you are cooking it in water, where ordinary white rice wants 1 1/2 to 2. Soak it first if you can, and the traditional soaked-and-steamed method uses no measured water at all: the rice never sits in water, it sits above it. That inversion is the whole reason this grain confuses people who cook it like jasmine.
Sticky rice — glutinous rice, sweet rice, khao niao — is not a stickier version of jasmine. It is a different starch: the starch in glutinous rice is made up almost entirely of branched amylopectin, and it lacks the straight-chain amylose that ordinary rice carries. That is what makes it clump into a ball you can press with your fingers, and it is also why the usual white-rice instinct fails here.
Pour jasmine ratios onto it and you get porridge. The grain was already hydrated before it met the heat, or it is going to be steamed rather than boiled, and either way it wants less water than the bag in your cupboard.
What cooks who make it every week actually use
| Cook | Method | Water per 1 part rice | Time |
|---|---|---|---|
| One cook (steamer bowl, no soak) | Washed and drained very well, then fresh water added | 1 : 0.67 — “one part rice to two-thirds water” | 25–30 min, steaming |
| Another cook (rice cooker, sweet-rice setting) | Washed, drained well, same ratio, cooker’s own gentle cycle | 1 : 0.67 — “the ratio is the same, two-thirds part of water” | 35–40 min on a slow setting |
| A third cook (soaked, then steamed) | Soaked 30 min in hot water, rinsed, then steamed in a cloth-lined basket | none measured — the rice sits above boiling water, not in it | 20 min steam, then rested uncovered |
The first two are the same cook working through two appliances, and the number does not move: two-thirds water to one part rice, both times. The third cook never measures water at all — soak, drain, steam. Read together, that is the lesson. The number is not the variable here. Whether the rice is sitting in water or above it is.
The one that surprises everybody. Two of the three cooks above use less water than rice, and the third uses none. Compare that with ordinary white rice at 1 1/2 to 2 cups of water per cup, and you can see why sticky rice goes wrong: people give it the water they give jasmine, and it turns to paste. If you remember one thing from this page, make it that sticky rice is the grain where you pour less, not more.
Why the number moves
- In the water or above it. This is the big one, and it is a bigger split than on any other grain on this site. Boiled in water, sticky rice wants about 2/3 water. Steamed in a basket, it wants no measured water at all, because it is taking moisture from steam rather than from a measured cup.
- Soaked or not. Soaking hydrates the grain before cooking, so the water you add afterwards has less work to do. A cook soaking in hot water for 30 minutes, or cold for 3–4 hours, or overnight, is shifting the ratio without changing the number. Skip the soak and you are asking the cooking water to do all of it — which is why no-soak results come out a little softer at the bottom of the bowl.
- How well you drained it. More than any other rice, sticky rice punishes a sloppy drain. Every cook above says to drain it thoroughly before adding fresh water. Water clinging to the grains is water you did not measure, and on a grain that wants 2/3 to begin with, a few spoonfuls of cling is the difference between right and gluey.
- Your cooker. Not every rice cooker handles it. A sweet-rice or brown-rice setting, cooking slow and gentle, does far better than a fast cycle, and some cookers simply will not do a good job with it.
Soaking and timing, by method
| Method | Soak | Cook | Result |
|---|---|---|---|
| Traditional steamer | 3–4 hours in cold or room-temp water; overnight is fine, up to 12 hours | About 25 min, flipping halfway, then 10 more | The benchmark — dry, separate, translucent grains |
| Steamer bowl (no soak) | None | 25–30 min | Slightly softer than the soaked version; the bottom of the bowl goes first |
| Rice cooker | None, but drain very well | 35–40 min on a slow, gentle setting | Close to steamed, a touch more moist |
| Microwave | 15 min in hot water, then drained and fresh water added | Varies by machine | Works, but the least forgiving — high heat tends to give a gummy outside |
Soaking long has a trade-off worth knowing: past about 12 hours the soaked grains get brittle and want gentle handling. Soaking in the fridge is fine if you are going overnight.
When sticky rice goes wrong
Mushy, or wet at the bottom
Too much water being the obvious cause, and an under-drained grain being the sneaky one. Precision matters more here than with any other rice — a little too much water and it is soft rather than chewy. Next time drain harder and go a shade under 2/3.
Hard in the middle
It did not soak long enough, or it did not steam long enough. Give it the full soak and the full 25 minutes before judging it, and if you are steaming a thick layer, make a hole in the middle so the steam reaches the centre.
Gummy on the outside, firm inside
Classic high-heat result, and the reason the microwave ranks last. Sticky rice wants gentle, even heat — a slow cooker cycle or a steamer, not a blast.
Where the numbers on this page come from. The 1 : 0.67 ratio and the times above come from cooks describing their own method — the bowl-steamed and rice-cooker numbers from one cook working through both appliances, and the soak-and-steam method from another working in a cloth-lined basket. They are home-kitchen numbers, not laboratory ones, and they shift with the age of the grain and the appliance. The 1 1/2 to 2 cups figure for ordinary white rice is this site’s own baseline, used here only as the comparison that makes the sticky-rice inversion visible — see how much water for rice. The description of glutinous starch as almost entirely amylopectin and essentially free of amylose comes from the food-science literature on glutinous rice starch; it is the reason this grain behaves the way it does, not a number to cook by.
Common questions
What is the water ratio for sticky rice?
About 1 part rice to 2/3 part water if you cook it in water — less water than rice. If you steam it the traditional way, you measure no water at all.
Does sticky rice need more water than regular rice?
No, the opposite. It needs less. Regular white rice wants 1 1/2 to 2 cups of water per cup; sticky rice cooked in water wants about two-thirds, and steamed sticky rice wants none measured.
Do you have to soak sticky rice?
Not strictly — there are workable no-soak methods — but soaking gives the best texture and it changes how much cooking water you need. Three to four hours is the common minimum; overnight is fine.
Can you cook sticky rice in a rice cooker?
Yes, on a sweet-rice or brown-rice setting with the same 2/3 water, drained very well. It takes 35–40 minutes on a gentle cycle. Some cookers do a better job than others.
Why is my sticky rice mushy?
Too much water, or too much water clinging to the grains because they were not drained properly. Drain hard, measure the fresh water, and go slightly under 2/3 next time.
Is glutinous rice the same as sticky rice?
Yes — sticky rice, glutinous rice and sweet rice are the same grain. “Glutinous” refers to the glue-like texture when cooked; it contains no gluten.
Can I use the sweet rice line in my rice cooker?
Check what it was drawn for. On some cookers that line is calibrated for Japanese short-grain rice rather than the long-grain sticky rice used in Thai cooking, so the fill line may not match your grain.
The takeaway
Sticky rice is the one grain on this site where the answer runs the other way: less water than rice, about 1 : 0.67, or none at all if you steam it. Soak it when you have the time, drain it far more thoroughly than you think you need to, and if your cooker has a slow sweet-rice cycle, use it. Pour jasmine water onto sticky rice and you will get porridge every time — the grain was never going to absorb it.