Tapioca is a starch obtained from the roots of the Cassava plant, also called Yucca or Manioc. The long cylindrical roots range from about 2 to 8 inches in diameter and 18 to 48 inches in length. They grow in clusters weighing from 5 to 30 pounds and have a tough brown skin, which when peeled, reveals a crisp white flesh. Tapioca flour is clean white in colour, with a bland flavour.
Cassava root.
Tapioca flour (starch) is used as a thickening agent, much like cornstarch. Tapioca starch is a popular choice for soups, fruit fillings, glazes, custards, and sauces, especially if they are to be frozen. For frozen sauces, use 2 teaspoons of tapioca flour to replace 1 tablespoon of wheat flour. Tapioca starch can be safely used by people on low-sodium or gluten-free diets.