Cornstarch is a fine, powdery substance derived from the starchy part of corn kernels, known for its neutral flavor and smooth, silky texture. Its primary culinary use is as a thickening agent in sauces, soups, and desserts, helping to achieve a glossy, velvety consistency. In international cooking, cornstarch is essential in Chinese cuisine for making stir-fry sauces and crispy coatings, while it also plays a key role in baking and pastry preparations worldwide. Historically, cornstarch became a popular ingredient in the United States during the 19th century with the rise of processed food products, and it continues to be a staple kitchen ingredient across many cultures.