pure corn starch

GrainsYear-round. Cornstarch is a shelf-stable processed product available continuously; it is derived from grain that is harvested annually in autumn in most temperate regions.

Cornstarch is nearly pure carbohydrate (approximately 91% by dry weight) with minimal protein, fat, or fiber. It is not a significant source of vitamins or minerals and is primarily valued for its functional properties rather than nutritional content.

About

Cornstarch, also known as corn flour or maize starch, is a fine, white powder extracted from the endosperm of corn (maize, Zea mays) kernels. It is produced by wet-milling corn kernels to separate the starch granules from other components, then drying and grinding them into a refined powder. The starch consists almost entirely of amylose and amylopectin polysaccharides, giving it neutral flavor and remarkable thickening properties.

Cornstarch is odorless and virtually flavorless, with a silky texture that dissolves in cool water and becomes thick and translucent when heated. It is composed of approximately 28% amylose and 72% amylopectin, which determines its gelling and thickening behavior during cooking.

Culinary Uses

Cornstarch is primarily used as a thickening agent in sauces, gravies, soups, and desserts, where it creates a smooth, glossy consistency without the flour-like flavor of wheat starch. It is essential in Asian cuisines for velveting proteins and thickening stir-fry sauces. In baking and pastry work, cornstarch is mixed with wheat flour to reduce gluten development, creating tender cakes and pastries. It also serves as an anti-caking agent, coating for fried foods, and base for whipped desserts like mousses and meringues. As a slurry—cornstarch mixed with cold water—it is whisked into hot liquids to thicken without lumping.

Forms & Preparations

  • Powder — Fine white powder, the standard form; used directly in dry applications or mixed with cold water to form a slurry before adding to hot liquids.
  • Slurry — Cornstarch mixed with cold water or other cold liquid to create a smooth paste; whisked into hot liquids to thicken without lumping.
  • Coating/Dusting — Applied dry to foods before frying or as a release agent when molding doughs; creates a light, crispy exterior on fried items.
  • Gel/Paste — Cooked with liquid, forming a thick, translucent, glossy gel used in glazes, pie fillings, and fruit desserts.

Substitutes

  • Unknown — Neutral-flavored starch from arrowroot rhizomes; use in equal amounts. Creates a clearer, more delicate gel and is preferred in acidic sauces where cornstarch may break down.
  • Unknown — Extracted from cassava roots; use in equal amounts. Creates a glossy, translucent thickening; slightly stretchy texture when cooled. Works well in Asian dishes and fruit fillings.
  • Unknown — Derived from potatoes; use in equal amounts or slightly less (up to 25% reduction). Creates smooth, glossy sauces; less heat-stable than cornstarch, so add near end of cooking.
  • Unknown — Finely ground rice; use 1.5 times the amount of cornstarch. Creates a slightly opaque thickener with subtle grain flavor; commonly used in Asian cooking.
  • Unknown — Use 2 times the amount of cornstarch. Must be cooked in fat (roux) to eliminate raw flour taste; creates less translucent, more opaque sauces with flour flavor.