I might have missed it, but the pie thickener guide has quick-cooking tapioca, but not tapioca flour/starch. Isn't quick-cooking tapioca the grainy stuff you use for tapioca pudding? If so, I'm also wondering if the quick-cooking tapioca would work better if it were made into a powder with a blender or food processor. I have easy access to tapioca flour, but some places might only have the quick-cooking tapioca.

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