cornstar
Cornstarch is almost pure carbohydrate with minimal protein, fiber, or micronutrients; it is primarily a source of calories and useful for its thickening properties rather than nutritional density.
About
Cornstarch is a fine, white, powdery carbohydrate derived from the endosperm of corn (maize, Zea mays), a cereal grain native to Mesoamerica. Produced by wet-milling corn kernels to separate the starchy interior from fiber and protein, cornstarch is nearly pure amylose and amylopectin polysaccharides. It is virtually flavorless, with a soft, smooth texture and a gritty feel on the tongue. The ingredient is widely used globally and is entirely gluten-free, making it valuable for those with celiac disease or gluten sensitivity.
Cornstarch is distinct from cornmeal and corn flour, which retain more of the corn kernel's nutritional components. Modern cornstarch production involves mechanical separation, washing, and drying processes that yield a highly refined product suitable for numerous culinary applications.
Culinary Uses
Cornstarch functions primarily as a thickening and binding agent in cooking and baking. In savory cooking, it thickens sauces, gravies, and soups, and is essential in Asian stir-fries and braised dishes. In baking, small amounts improve texture and reduce gluten development in cakes, cookies, and pastries. Cornstarch is also used as a breading ingredient for fried foods and as a dusting powder to prevent sticking. It is a staple ingredient in custards, puddings, and dessert fillings, where it provides a smooth, silky mouthfeel without the graininess of flour.