https://bestwithchocolate.com/oat-flour-graham-crackers/

Dough very sticky. Also very sweet. Didn't cut nicely into squares.
Try the other oat Graham crackers recipe next time.
If that doesn't work try this one with reduced maple syrup.
Used arrowroot instead of cornstarch if that matters.