Preheat oven to 325*F and prepare a baking sheet with parchment. Set aside.

In a medium size bowl, whisk together the oat flour, rolled oats, whole wheat flour, baking powder, ground flaxseed, and parsley flakes then set aside.

In a small bowl, whisk together the peanut butter, egg and milk until fully combined.

Pour the wet ingredients into the dry ingredients and stir until no wet ingredients remain in the bottom of the bowl.

To fully incorporate all ingredients, turn the mixture out onto a lightly floured surface (with Whole Wheat Flour) and knead the mixture until everything is combined.

With a rolling pin, roll out the dough to a quarter or half-inch thickness.

Using cookie cutters of your choosing or a knife, cut the dough into shapes.

Place the shapes onto the prepared baking pan leaving a half-inch space between each treat.

Bake the cookies for 15 minutes or until lightly brown on the bottom. Remove the cookies from the oven and flip. Return to the oven and bake for another 10-12 minutes until browned on all sides and firm to the touch.

Remove from the oven and let cool completely before feeding to your pets. As the treats cool, they will harden even more.

The cookies will keep for up to a month in a zip-locked back when stored in a cool, dry place.