Hi Carolyn,
I have had great success substituting potato starch for tapioca starch. There is also arrowroot starch which I am not quite as familiar with, but have heard it can also be used as a 1:1 substitution. I'd say start with potato starch and see where that leaves you. Good luck and make sure to let us know how it goes :)
- Alyssa
January 19, 2015 at 2:39pm
In reply to Most flour blends I have seen use tapioca and/or cornstarch as … by Carolyn (not verified)