Preheat oven to 375 and line two pans with parchment paper.
In a large mixing bowl, add your dry ingredients and stir them together (oats, walnuts, oat flour, flax seed, cocoa powder, baking soda, salt). Push your dry ingredients around the sides of the bowl, creating a well in the middle.
Add your wet ingredients into the middle of the well of the mixing bowl (banana, honey, egg and vanilla) and stir them together.
Now, stir your dry and wet ingredients together. Add your chocolate chips to the cookie batter and fold them in gently.
Using a cookie scoop, scoop your breakfast cookie dough onto the pans, a few inches apart. Bake in the oven for 10-12 minutes each, till the tops of the cookies are set.
Let cool entirely, and then devour!
Store in an airtight container in the fridge, and these cookies will last about a week.