Preheat oven to 350 degrees and line a baking sheet or two( depending on the size) with parchment paper.Prepare flax eggs by whisking ground flax seed and water together in a bowl and set aside to thicken.In another bowl combine corn flour, oat flour, brown rice flour, salt, and baking soda.Once flax eggs have thickened add peanut butter, coconut oil, and maple syrup. Whisk to combine.Scoop peanut butter mixture into dry ingredients and stir to combine. This will take some muscle to combine or you can use a mixer.Break off small bits of the dough, roll into a ball, and place on baking sheet.Bake for 20-25 minutes or until crisp and browned lightly.