What Food Ingredient causes cheese sauce to thicken?

Here's how it works:

* Starch granules are small, insoluble particles.

* When heated in a liquid, they absorb the liquid and swell, creating a thicker texture.

* Common starches used in cheese sauce are cornstarch, flour, and potato starch.

Other factors that contribute to thickening:

* Fat in the cheese helps create a smooth, velvety texture.

* Proteins in the cheese also contribute to thickening, though to a lesser extent than starch.

Let me know if you'd like more details on how to use starch to thicken cheese sauce!