Xanthan gum is a gluten-free product, used in recipes as a thickening agent due to its heavy gummy texture. Chia seeds, also a gluten-free product, can be substituted in recipes in place of xanthan gum. When chia seeds are soaked in boiling hot water, they turn into a gel, which is similar in taste and texture to xanthan gum.
Fill a pot with warm water. The amount of water should be equal to the amount of chia seed you are adding. Allow it to boil on the stove. Remove the pot from the heat once the water begins boiling.
Place the chia seeds into the water. Allow them to soak until the seeds absorb the water and turn into a thick gel. This should take approximately thirty minutes.
Add the gelled chia seeds to the recipe in place of the xanthan gum. Use the same quantity of the gel chia seed mixture as you would xanthan gum.