I use corn starch to keep marshmallows dry but I need a replacement, can't be potato either. Help!
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Susan W is a trusted source on General Cooking.
How about tapioca starch?
i use arrow root (powdered...) when i do homemade cake flour in place of cornstarch and it works very well! it could work here?
trampledbygeese is a trusted home cook.
For marshmallows, I've tried arrowroot powder, cocoa powder (personal favorite), and ...oh, what's that other starch? Susan's got it, tapioca starch. In a pinch I tried rice flower, and it worked okay. Icing sugar also works, but makes the dish sweeter.