Xanthan Gum is a plant-based thickening and stabilizing agent. In the world of gluten-Free baking, xanthan gum plays the crucial role of imitating gluten. In baking, gluten is what makes dough doughy. It gives the dough elasticity, as well as viscosity. Those properties help to hold a cookie together while it bakes on a sheet in the oven, and they enable cakes and breads to hold onto the gas bubbles that form inside them - this allows them to rise and take shape.