What is the thickening agent in gravy that starts with corn?

The thickening agent in gravy that starts with "corn" is cornstarch. It is a fine, powdery substance derived from corn kernels and is commonly used to thicken Sauces and Gravies. When mixed with a liquid and heated, cornstarch gelatinizes, creating a smooth, thick texture. It's important to mix it with cold liquid before adding it to hot mixtures to prevent clumping.