Rice flour comes from milled rice grains, ground into a fine powder. It can be made from virtually any variety of rice, including long-grain, short-grain, white, brown, or glutinous (sticky) rice, and each produces a flour with distinct properties. The process is straightforward in concept but varies in method, and those differences shape how the flour behaves in cooking and baking.
From Paddy Field to Grain
Rice starts as a grass plant grown in flooded or irrigated fields across Asia, the Americas, Africa, and parts of Europe. After harvesting, the outer husk (an inedible protective shell) is removed, leaving brown rice. At this stage, the grain still has its bran layer and germ intact. To make white rice, millers polish the grain further, stripping away the bran and germ and leaving only the starchy endosperm. Both brown and white rice can be turned into flour, and the part of the grain that’s kept determines the flour’s color, flavor, and nutrition.
How Rice Becomes Flour
There are two main ways to turn rice into flour: dry milling and wet milling.
In dry milling, raw rice grains are fed into a high-speed crusher or hammer mill and ground directly into powder. The powder is then passed through sieves of varying mesh sizes to achieve a consistent particle size. It’s fast and produces minimal waste, but the mechanical force can damage some of the starch granules, which changes how the flour absorbs water and behaves during cooking.
Wet milling takes a different approach. The rice is soaked in water first, which softens the grains and reduces their hardness. The softened rice is then crushed and screened. Because the grains break apart more gently, wet-milled flour retains more intact starch granules and produces a smoother, silkier texture. The trade-off is significant water use and sewage discharge from the soaking, crushing, and screening stages, making wet milling more resource-intensive. Traditional rice flour production in many parts of Southeast and East Asia has historically relied on wet milling, and the textural difference is one reason certain traditional rice cakes and noodles are difficult to replicate with store-bought dry-milled flour.
Types of Rice Flour
Not all rice flour is the same. The variety of rice used and how much of the grain is retained create flours with very different characteristics.
White Rice Flour
This is the most common type on store shelves. It’s made from polished white rice with the bran and germ removed, giving it a smooth texture, neutral taste, and bright white color. It’s mostly starch with relatively modest protein (around 7.2 to 7.6 grams per 100 grams) and very little fiber (about 1 gram per 100 grams). Its mineral content is low compared to other plant-based flours, with particularly small amounts of calcium, potassium, and magnesium.
Brown Rice Flour
Brown rice flour retains the outer bran layer, which gives it a denser texture and a slightly nutty flavor. That bran also carries more fiber, B vitamins, and minerals than the polished white version. The downside is a shorter shelf life, since the oils in the bran can go rancid over time. Many people store brown rice flour in the refrigerator or freezer to extend its usability.
Glutinous (Sweet) Rice Flour
Despite the name, glutinous rice flour contains no gluten. “Glutinous” refers to its sticky, glue-like texture when cooked. The key difference is starch composition. Regular rice contains a mix of two types of starch, but glutinous rice is almost entirely made up of the branching, sticky type, with the straight-chain type making up only 0 to 2 percent. This makes it ideal for chewy desserts like Japanese mochi, Chinese tang yuan (rice balls), and Filipino bibingka. It behaves completely differently from regular rice flour in recipes, and the two are not interchangeable.
Why Rice Flour Works as a Gluten-Free Staple
Rice is inherently free of gluten, the protein network found in wheat, barley, and rye. Under U.S. food labeling rules, a product can carry a “gluten-free” label if it contains fewer than 20 parts per million of gluten. Because rice naturally contains none, rice flour qualifies easily, assuming it hasn’t been contaminated during processing in a facility that also handles wheat.
That gluten-free quality is both a strength and a limitation. Gluten is what gives wheat dough its stretchy, elastic structure and its ability to trap gas bubbles during fermentation, which is how bread rises and holds its shape. Rice flour dough lacks this ability entirely. On its own, it produces baked goods that are denser, more crumbly, and flatter than their wheat counterparts. Most gluten-free baking recipes compensate by blending rice flour with other starches, gums, or binding agents to mimic some of that structure.
Common Uses in Cooking
Rice flour shows up in a huge range of foods worldwide, often in ways people don’t immediately recognize. In Asian cuisines, it forms the base of rice noodles (like Vietnamese pho noodles and Thai pad see ew noodles), steamed rice cakes, and dumpling wrappers. Japanese tempura batter often includes rice flour for a lighter, crispier coating.
In Western cooking, rice flour works well as a thickener for sauces, gravies, and soups. It thickens without adding a strong flavor, and it doesn’t clump as readily as wheat flour when added to hot liquids. It’s also a popular coating for frying because it creates a particularly crisp, delicate crust. Many commercial gluten-free pasta, bread, and snack products use rice flour as their primary ingredient, sometimes combined with tapioca or potato starch for better texture.
The flour’s ability to absorb water and swell during heating is central to most of these uses. When rice flour is heated in the presence of water, its starch granules absorb moisture and expand, thickening whatever liquid surrounds them. The degree of swelling depends on the milling method, particle size, and whether the starch has been physically modified through processes like heat-moisture treatment, which alters how readily the starch hydrates.
How to Store Rice Flour
White rice flour keeps well in a cool, dry pantry for six months to a year because the oils in the bran and germ have been removed. Brown rice flour is more perishable. The natural oils left in the bran layer oxidize over time, giving the flour a bitter, off taste. Storing it in an airtight container in the refrigerator extends its life to about four to six months, or up to a year in the freezer. Glutinous rice flour has a shelf life similar to white rice flour, since it’s also made from polished grain.