Preheat oven to 375 °F
Mix together all ingredients to make a dough (Note: Oat flour dough will be spoonable, like drop biscuits.)
With floured hands, pat dough to 1/4" thick on lightly floured surface.
Use cookie cutters to cut out treats.
Place cut-out treats on an ungreased baking sheet. (Spoon oat flour treats onto ungreased baking sheet.)
Bake for 8-20 minutes, depending on size, thickness, and desired crispness.
Remove from oven when treats are puffed, golden brown, and crusty to touch.
Allow to cool completely.
Baked treats can be stored an uncovered container on the counter for about 3 days.
Freeze treats in a sealed container if you want to save them longer than 3 days.