Arrowroot Powder (also referred to as Arrowroot Starch or Arrowroot Flour) is extracted from the rootstock of the arrowroot plant.  Arrowroot powder is a relatively flavorless starch that is easily digestible and frequently utilized by people with dietary restrictions.  Arrowroot makes a clear gel and is also used to prevent ice crystals from forming in ice cream.  It can be used as a gluten-free thickener for those with a gluten intolerance.