Unlike true cinnamon, cassia is harvested by cutting down the entire tree and stripping off the bark.  The bark is cut into large squares, and as it dries, the edges of each thick layer curl in upon themselves, creating a scroll-like stick.  Cassia is sold in stick form or ground to a fine powder.  Because it is so hard, the bark must be ground in a professional mill and the powder sifted to remove any stray fragments.

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