What are the black balls in bubble tea?

What are the black balls in bubble tea?

The bubbles in bubble tea are tapioca pearls. Tapioca pearls are dark little balls of starch that can be made to vary in color and in texture depending on the type of flavoring and starch used to make them. Typically most tapioca pearls are made from tapioca starch taken from the cassava root. Jun 10, 2021

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