So glad you enjoy my mad ramblings! Arrowroot should work just fine, as will rice or tapioca flour. Regular flour works too, but won't be as crisp unless you add baking powder and will go brown much more quickly, so would fry at a slightly lower temp. Would love to know how they turn out if you try them, and what you'd serve them with! They're a new favourite so they're going with anything I can think of!