Cornflour, cornstarch, maize starch, or corn starch is the starch derived from corn grain. The starch is obtained from the endosperm of the kernel. Corn starch is a common food ingredient, often used to thicken sauces or soups, and to make corn syrup and other sugars.

Corn flour can be part of a healthy diet when consumed in moderation. It provides energy through carbohydrates, essential vitamins, minerals, and dietary fibre.