Arrowroot Powder is the dehydrated and ground arrowroot tuber (not the cassava root). It is mostly a starch and is great for adding lightness to a recipe (also lovely for thickening sauces). Tapioca Starch comes from the ground cassava (a.k.a. yucca, yuca, manioc, tapioca) root. This is not the same as arrowroot powder. Even though many people use tapioca and arrowroot interchangeably, they actually have fairly different properties in baking. Tapioca adds elasticity to baking, helping bind as we

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