Glutinous Rice Flour (Mochiko / Sweet Rice Flour)

What it is

Flour milled from glutinous ("sticky," "sweet") rice. Sold as Japanese mochiko and the finer shiratamako, Thai/Chinese sweet rice flour, etc. Despite the name it contains no gluten whatsoever and is fully celiac-safe.

How it's made

Glutinous rice (a distinct rice variety, opaque white when raw) is milled to a fine powder. Shiratamako is made by a wet process producing coarse granules that dissolve into an especially smooth, elastic dough.

Flavor profile

Mild, subtly sweet. The defining trait is texture: cooked, it becomes intensely chewy, stretchy, sticky, and cohesive — the mochi mouthfeel.

The sticky texture explained — Glutinous rice is almost pure amylopectin (near-zero amylose). Amylopectin's bushy, branched molecules trap water and tangle together when gelatinized, producing a soft, cohesive, elastic mass that does not firm up or separate the way amylose-rich starches do. That single compositional fact — high amylopectin, no amylose — is the entire reason mochi is mochi. (The word "glutinous" refers to this glue-like stickiness, not to the protein gluten.)

Culinary uses

Mochi and daifuku (Japan), tang yuan (Chinese glutinous rice balls in sweet soup), nian gao (Chinese New Year sticky cake), butter mochi and chewy cakes, dango, and as a chewy thickener. It can do chew and stretch like nothing else; it cannot do crisp, light structure.

Regional variations

Japanese mochiko vs. shiratamako (different grinds, different textures); Thai and Chinese glutinous rice flours are slightly different again. Nian gao itself varies sweet (Shanghai) vs. savory (regional).

Cultural & historical context

Glutinous rice carries deep ritual weight across East and Southeast Asia: mochi-pounding (mochitsuki) at Japanese New Year, nian gao whose name puns on "higher year" (prosperity), tang yuan eaten at the Winter Solstice and Lantern Festival to symbolize family reunion. The stickiness is itself a metaphor for togetherness.

Reference notes

Tags: `rice`, `glutinous`, `gluten-free`, `high-amylopectin`, `chewy`, `festival-food`. Related ingredients: [Regular Rice Flour], [Tapioca Starch]. Related cuisines: Japanese, Chinese, Thai, Filipino. Suggested links: → Amylose vs. amylopectin, → Mochi, → Nian gao, → Tang yuan.