Here’s a great article highlighting 5 common gluten free thickeners for sauces, gravies, soups, pies, and other recipes usually thickened with flour.
If you’re gluten-free (or gluten-aware) definitely check this out! It’s an easy way to thicken your soup or stew without using flour or other wheat based thickener.
http://www.fitsugar.com/Gluten-Free-Sauce-Thickeners-20276714