RE: Popcorn Chicken
Is it battered or coated/breaded?
I've never had it, but I think KFC's chicken is not batter dipped (?).
Just a guess ... you might try the flour-eggwash-flour, or flour-eggwash-finely ground breadcrumbs.
With the straight flour coating, I'd probably go with a bit of seasoning in the flour ... some cajun seasoning ... maybe a tablespoon to two cups of flour (or maybe some paprika and spices, lawrey's etc).
If the coating seems a bit thin, do the breading sequence twice to each piece ... particularly with the straight flour coating ... so, flour-eggwash-flour-eggwash-flour ..... and then fry them promptly, you don't want them to get gummy.