Glutinous rice
Glutinous rice (sweet rice, short for "gluten-free") looks like ordinary rice and cooks with the same water — and then behaves nothing like it. All of its starch is amylopectin, so it gels instead of swelling, it holds a fill instead of falling apart, and it is soft and stretchy when warm and hard and brittle the second it cools. Every mochi, daifuku, zongzi, and sticky-rice parcel is that one property being used. Read this before any of the daifuku or zongzi recipes below.
Why it gels instead of swelling
A grain of ordinary rice is a mixture of two starches: amylose, which leaches out into the water and gives you separate grains, and amylopectin, which gels. Glutinous rice has almost only amylopectin. When you cook it — soak, steam until the water has gone, rest in the steam — every grain swells and its starch turns to a soft, glossy, holding gel. Two consequences follow, and the recipes that use this rice are all written around them.
First, cooked glutinous rice binds itself together: the gel on each grain fuses with its neighbours as they press and work, so the mass holds a shape and can be rolled and filled without any binder, egg, or dough around it. That is the whole of the daifuku and the zongzi family. Second, that same gel sets hard and brittle when it cools: a mochi left on a plate for twenty minutes is a hard candy, not a soft pillowy thing. So the whole job of the cook is not to get it cooked — that part is nearly foolproof — but to keep it workable in the window between "still wet" and "already set", and to plan the recipe so the dish is eaten in that window.
The three cooks: steamed, soaked-steamed, and fried
Steam from a soak. Soak the dry rice at least 1 hour (overnight for a bigger job), drain it well, and steam it over a full, rolling boil for 20–35 minutes, depending on the grain, until the water has fully gone and each grain is translucent and glossy. This is the classic mochi and sweet-sticky-rice cook.
The pounded version. A true pounded mochi (餅つき) hammers hot-steamed rice so the granules break into a continuous, translucent, holding gel — the same amylopectin, but physically worked. You cannot replicate the machine in a home kitchen; you replicate the effect. That is done three ways that all work:
- Mix-and-steam (the easy mochi). Rice flour and water, kneaded to a shaggy paste and steamed into a single holding mass. This is the daifuku method on this site, and it is the one to use if you do not own a food mill.
- Grind-and-steam. Cooked, well-drained glutinous rice, worked in a food mill or processor into a smooth, glossy mass. Closer to pounded rice than flour will get you.
- The rice-cooker gel. The soaked-rice and-same-water method, in a closed cooker, then mashed in the pot. The trapped steam keeps the working window open long enough.
Fried (the sweet-fritter half). The kluai tor and every glutinous-rice fritter on this site is the cooked, sticky, holding grain wrapped in a little batter and deep-fried. The batter is not the point of the dish — the fried shell around a grain of soft, holding, sticking together rice is. If the banana fritter falls apart in the oil, the rice was not sticky enough or the coating was not thick enough to hold it.
Keeping the gel in the cook (the two-window problem)
The working problem is the same in every recipe: the gel turns from soft/stretchy into hard/brittle as it cools, and that change is fast. Three moves keep it working.
Work it while it is hot. Mochi, daifuku, and any filled rice cake are shaped hot, not warm, not room temperature. The starch is at its most extensible right after the steam and the first 10–15 minutes after. Put them on a plate and try to shape them later, and they will crack and split.
Hold it in the steam. If you are making a batch and shaping as you go, keep the unworked mass on top of the still-steaming pot (or wrapped in a cloth over it) so the whole thing stays at or above the gel-setting point until you use it. The steam is a holding bath that you are deliberately reusing.
Plan to eat it on the day. A filled mochi that has set is not a failure of the cook; it is just outside the window. This is why a lot of the family is a today family, and why the fillings (sweet red-bean paste, azuki) are the stable part of the plate — the gel is the part that is now.
Failure modes
- The mochi is chewy rubber, not soft. Either the rice was undercooked (water still in it when you stopped) or you shaped it after it had begun to set. Check for full translucency and a dry steamer before you start shaping, and shape in the first 10–15 minutes.
- It splits and cracks as you fill it. The mass has started to set and lost its extensibility. Re-steam it for 1–2 minutes to bring it back over the gel window, then work it again. This is a repeatable move, not a waste-of-the-batch move.
- A filling leaks out through the skin. The wall is too thin for the amount of filling, or the mass was not hot enough to bond to itself. A filled skin should be roughly the same thickness as an unthinned daifuku wrapper; if you are stretching it to get there, the mass is too cool or too dry.
- It is dense and gummy in the middle. Not enough steam time for the quantity — the outer grains gel and the core is still raw starch. Steam in a single layer rather than a pile, and go by translucency and a dry dish, not a set timer.
- The fritter falls apart in the oil. The grain was not sticky enough to hold, or the coating was too thin. Use genuinely cooked, well-drained, glossy rice, a coating of batter at least a couple of millimetres over the surface, and a lower, longer fry (the battering logic from the frying article).
In practice
Daifuku is the mix-and-steam method at its cleanest: rice-flour gel, sweet red-bean paste, and the whole window handled in a single sitting. The banana fritters in the Thai section are the fried half of the same family, and the spring rolls and dumplings pages are the closest things to a cooked version of the holding gel wrapped around a different grain. The rice article is where the non-glutinous half lives.