Tapioca Flour, also known as tapioca starch, is ground to a powdery fine granulation from dried cassava roots. It is a starchy and slightly sweet flour that is especially good for thickening soups, sauced, dips, pie fillings and puddings. Tapioca flour is also an excellent ingredient for gluten-free baking, as it lends a springy texture, promotes browning and makes crispy crusts.