This is not my recipe, but wanted to share:

1c quinoa flour
1/2c tapioca flour
3T oil (I use olive)
1/2c apple juice concentrate, thawed

*combine flours in bowl, mix oil and juice together and stir
them into the flour, knead to absorb all flour and form a very
hard dough. Roll to 3/8″ on floured board, cut into 1×3 inch
bars (I sloppily curve the edges bc they get sharp), transfer to
lightly oiled baking sheet, bake at 300 for 35-40mins or until
begin browning, turn off oven and leave for an hr to
harden-makes about 1 1/2 dozen

I'm told by my friend that these are significantly less messy
than the store bought ones and last longer too. Nate loves them.
I keep them in a ziploc in the freezer, which is even better bc
then they're cold.