Hi Elaine, we don't think cornstarch is your best option for replacing xanthan gum in your gluten-free baking. Can you tolerate psyllium husk? This is a common stabilizer used in gluten-free baking, and is especially useful in gluten-free yeast bread recipes. Other options to consider are chia seeds or flax meal. You can read more about these ingredients and how to use them in this article. 

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