argo or kingsford's cornstar

GrainsYear-round. Cornstarch is a shelf-stable processed ingredient derived from corn harvested primarily in autumn, but industrial processing and storage make it consistently available throughout the year.

Cornstarch is almost pure carbohydrate with minimal nutritional density; it contains negligible protein, fat, fiber, and micronutrients, and is primarily composed of simple starches that convert rapidly to glucose upon digestion.

About

Cornstarch is a fine, powdery carbohydrate extracted from the endosperm of corn (maize) kernels through a wet-milling process. The kernels are soaked, ground, and centrifuged to isolate the starchy component, which is then dried and milled into an impalpable white powder. This refined product is nearly pure amylose and amylopectin—the two glucose polymers that comprise starch—with minimal protein, fat, or fiber remaining.

Cornstarch is virtually flavorless and odorless, with a neutral taste that does not interfere with other ingredients. It differs fundamentally from cornmeal or corn flour, which retain bran and germ components, making it the preferred thickening agent in cuisines worldwide where clarity and smooth texture are desired.

Culinary Uses

Cornstarch functions primarily as a thickening and binding agent in cooking and baking. In sauces, gravies, and glazes, it is mixed with cold liquid to form a slurry before being added to hot liquids, where heat gelatinizes the starch granules and creates a glossy, transparent thickening. In Asian cuisines, particularly Chinese, cornstarch is essential in wok cooking, coating proteins and vegetables to achieve a silken texture and subtle binding effect. It is also used in baking to reduce gluten development in pastries and cakes, producing tender crumbs, and in puddings and custards to achieve the desired viscosity. Additionally, cornstarch serves as an anti-caking agent in dry ingredients and a dusting powder to prevent sticking.

Forms & Preparations

  • Powder — Fine, white, free-flowing powder; the standard commercial form used directly in cooking and baking.
  • Slurry — Cornstarch mixed with cold water or other cold liquid before adding to hot foods; prevents clumping and ensures smooth thickening.
  • Dusting powder — Applied dry to work surfaces, baking molds, or food items to prevent sticking during handling and cooking.
  • Modified cornstarch — Industrial products chemically or physically altered for specific applications, such as instant pudding mixes or specialized food manufacturing.