Cornstarch / Corn Flour (American)

What it is

The pure starch of the corn kernel: an ultra-fine, bright-white, squeaky powder. (US: "cornstarch." UK: "cornflour." Same thing.)

How it's made

Corn is wet-milled; the starchy endosperm is separated from protein and fiber, and the starch is washed, refined, and dried to near-pure carbohydrate.

Flavor profile

Neutral to the point of nothing; it exists for texture, not taste.

Culinary uses & starch behavior — The default Western thickener. Dispersed in cold liquid (a "slurry") then heated, its granules gelatinize around 62–72°C, swelling and bursting to thicken into a glossy-to-slightly-opaque body that sets soft on cooling. Key limits: it thins out under prolonged heat, vigorous boiling, or acidity (which fragment the starch), and over-stirring after thickening breaks the gel. It also clouds slightly and can taste starchy if undercooked. Chinese cooking leans on it heavily — both as a sauce thickener that gives that restaurant glossy gravy, and as the heart of velveting (see Cornstarch — Chinese velveting under Specialty Thickeners). Used in pie fillings, puddings, and as a tenderizer in baking (it dilutes flour's protein — the cornstarch trick for DIY cake flour).

Regional variations

The thickener of choice in American, Chinese, and much of global cooking; elsewhere potato, tapioca, or kuzu fill the role.

Cultural & historical context

Industrial corn wet-milling (19th century) made cheap pure starch ubiquitous, reshaping home cooking around quick, reliable slurry-thickened sauces and gravies.

Reference notes

Tags: `corn`, `starch`, `gluten-free`, `thickener`, `velveting`. Related ingredients: [Arrowroot], [Tapioca Starch], [Potato Starch], [Kudzu Starch]. Related cuisines: American, Chinese. Suggested links: → Starch gelatinization, → Velveting technique, → Arrowroot (acid-tolerant alternative).