Given the current craze with gluten-free diets, the first thing to know about glutinous rice is that it has nothing to do with gluten. If you actually do have Celiac, you can safely consume it, as it contains no gluten. In fact, no rice contains gluten. The word glutinous refers to the rice being sticky and gummy. It is also sometimes called waxy rice, sticky rice, or, since it has a natural sweetness, sweet rice. This is the kind of rice used in the classic Thai dessert Sticky Rice with Mangoes, but also savory dishes.
The word “glutinous” is often a source of modern confusion because of the above mentioned association with gluten-free, but it is actually etymologically perfect. It derives from the Latin glūtinōsus, meaning “gummy” or “sticky” like glue. Long before “gluten” was used specifically to describe the proteins found in wheat, it was a general term for anything with an adhesive quality. In the case of rice, this “glue-like” behavior isn’t caused by protein, but by a unique starch profile.
The Special Starch Profile of Glutinous Rice
It is noteworthy to mention that all short grain rice is “sticky” comparted to long grain rices like Jasmine. However, glutinous rice brigs stickiness to a new level. While most rice contains a balance of amylose (straight-chain starch) and amylopectin (branched-chain starch), Thai Sticky Rice
is almost 100% amylopectin. These highly branched molecules act like a tangled web; when heated, they bond and “lock” into each other, creating the signature chewy, elastic texture that allows the rice to be rolled into balls and eaten by hand.
While sticky rice is great for Sticky Rice and Mangos, it isn’t the kind of rice you need for your homemade Thai Curry! Learn why Jasmine Rice is the best rice for authentic Thai curries, and why even aromatic Basmati rice can’t compete.
Amylose in Sticky Rice: The “Straight” Starch
Amylose consists of long, linear chains of glucose. Because these chains are straight, they can pack together tightly, like strands of dry spaghetti in a pasta box. When heated in water, they don’t easily break apart or “tangle,” which is why rices high in amylose (like Basmati) stay firm, individual, and fluffy. This is also why high-amylose starches are excellent for thickening, they create a stable, translucent gel.
Amylopectin in Glutinous Rice: The “Branched” Starch
Amylopectin molecules, however, are massive and highly branched, think of them like a dense, tangled blackberry bramble. Because they are so open and branched, they cannot pack together. When heated, these “branches” splay out and hook into the branches of neighboring molecules. This molecular velcro effect is what creates the sticky, elastic bond of glutinous rice. The more amylopectin a grain has, the more it resists staying separate and the more it clings to its neighboring grains.
The Steaming Key: Why You Can’t Boil Sticky Rice
Because glutinous rice is almost pure amylopectin, its reaction to heat and water is volatile. If you attempt to cook it like standard Jasmine or Basmati, by boiling it in a pot of water, the branched starch molecules gelatinize too aggressively. They burst and fuse, turning the pot into a singular, gummy mass of starch paste rather than distinct grains.
To protect the integrity of the grain, true sticky rice must be steamed. By soaking the rice for several hours to hydrate the core and then suspending it in a bamboo steamer over boiling water, you allow the heat to gelatinize the starch without the mechanical agitation of boiling water. This is the only way to achieve the signature chewy but separate texture required for authentic Thai or Laotian dishes.
Again, all short-grain rice generally has more amylopectin, although the amounts still vary. However, do not mistake other short grain rice with similar appearance to glutinous rice. The content of this sticky starch in all rices is somewhere between 17 to 28 percent.
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Beyond the Grain: Sticky Rice Flour and Cakes
While most Thai dishes utilize the whole grain, many of the most famous Asian “cakes”, such as Japanese Mochi, Chinese Nian Gao, and Filipino Bibingka, rely on glutinous rice flour.
When the rice is ground into a fine powder, the high amylopectin content creates a uniquely elastic, rubbery, and chewy texture often referred to in Taiwan as “QQ.”
- Steamed Cakes: Most traditional rice cakes are steamed to maintain moisture, resulting in a dense, tacky finish.
- Baked Cakes: In some traditions, like the Filipino Bibingka or “Hawaiian Butter Mochi,” the flour is mixed with coconut milk and eggs then baked. The dry heat of the oven creates a crisp, golden crust that contrasts beautifully with the gooey, “mochi-like” interior.
Pro Tip: If a recipe calls for “Sticky Rice Flour,” do not substitute regular rice flour. Regular rice flour is made from long-grain rices high in amylose and will result in a crumbly, stiff cake rather than the elastic, bouncy texture required for these desserts.
What to Buy in the US: Koda Farms Mochiko — For cooks in the United States, Koda Farms Sho-Chiku-Bai Mochiko is the gold standard for glutinous rice flour. Produced by the oldest family-owned and operated rice farm in California, this flour is milled from a specific heirloom variety of short-grain glutinous rice (Oryza sativa var. glutinosa).
Unlike some imported flours that can be gritty, Mochiko is California-grown and cold-milled, resulting in an exceptionally fine, starchy powder. It is the go-to choice for making Hawaiian Butter Mochi or Japanese-style sweets because of its consistent “QQ” elasticity and neutral, slightly sweet flavor profile. I’ve used it successfully to make the former on several occasions.
Where Sticky Rice is the Daily Staple
While most of the world treats glutinous rice as a specialty ingredient for desserts, in certain parts of Southeast Asia, it is the primary daily starch.
- Laos and Isan (Northeast Thailand): In these regions, sticky rice (called Khao Niew) is the absolute staple. It is traditionally served in a woven bamboo basket called a KRIP or thip khao. Because of its high amylopectin content, the rice is sturdy enough to be pinched into a small ball and used as a utensil to scoop up Larb or dipping sauces like Jeow Som.
- Vietnam: You’ll find Xôi, a category of savory or sweet sticky rice dishes often sold as a quick, hearty breakfast. Because it’s so dense and slow to digest, it’s the ultimate “fuel” for a long workday.
- China: Sticky rice is the star of Zongzi, triangular dumplings wrapped in bamboo or reed leaves and boiled or steamed. Here, the “glue” property is used to bind fillings like salted egg yolk and pork belly into a cohesive, portable meal.
Other Names For Sticky Rice: Other names for glutinous rice, besides those above, are boton rice, biroin chal, mochi rice, pearl rice and pulut. Pearl Rice is often a point of confusion. In many US grocery stores, “Pearl Rice” refers to a standard short-grain rice (like Calrose) which is sticky but not glutinous. Therefore, when buying sticky rice, makes sure you look for words “Glutinous” or “Sweet” specifically.
The Role of Sticky Rice in Rice Wine Fermentation
Beyond being eaten as a grain or flour, glutinous rice is the foundational ingredient for most traditional Asian rice wines, such as Chinese Shaoxing, Japanese Sake (which uses specific “waxy” strains), and Thai Sato.
The high amylopectin content is again the hero here. During the brewing process, microorganisms (like Aspergillus oryzae or traditional yeast balls) break down these highly branched starches into fermentable sugars more efficiently than they can with the straight-chain starches in regular rice. This results in a higher sugar yield, which is why rice wines made from glutinous varieties tend to have a deeper complexity and a naturally sweeter finish.
An Important Note on Safety: The Mochi Choking Hazard and Grains vs. Cakes
When discussing safety, it is important to differentiate between the whole grain and processed rice cakes. For infants, any small, firm food carries a minor risk of aspiration (inhaling a piece into the airway). In this regard, a grain of sticky rice is no more inherently dangerous than a Cheerio or a small piece of bread. Properly steamed sticky rice is soft and separates easily with minimal pressure, making it manageable for older infants who have begun to master mashing their food.
The more significant hazard—which frequently makes international headlines, is specifically related to Mochi and other dense rice cakes.
- The “Suction” Effect: Unlike bread, which dissolves when saturated with saliva, mochi is viscoelastic. Saliva doesn’t break it down; it simply makes it more slippery.
- The New Year Hazard: In Japan, mochi is a traditional New Year’s food, but it is also a well-known choking hazard for the elderly and young children. Because it is so dense and elastic, it can act like a “suction cup” in the throat, making it notoriously difficult to dislodge. It’s a bit like the trouble your dog has with peanut butter.
The Takeaway: Whole-grain sticky rice is a wonderful staple, but processed rice cakes should always be cut into very small, bite-sized pieces and consumed slowly with plenty of liquid.
Remember, what you feed your baby is your decision, alone. Use this as information only, seek out professional expertise, and make your own parenting decision. If you feel that rice grains are a danger to your baby, that is perfectly valid!
Further Reading
- How to Make an Authentic Thai Curry with Store-Bought Curry Paste
- What Does It Mean to Say a Dish is “Thai-Style”? A Deep Dive into the Essentials of Thai Cooking