Preheat oven to 350’C. In a mixing bowl whisk together flour, cinnamon, baking soda and salt for 20 seconds, set aside.
In a large bowl, use hand mixer whip together butter, granulated sugar and brown sugar until creamy. Mix in egg and vanilla extract.
Add zucchini, then slowly add in flour mixture. Stir in oats, walnuts and chocolate chips (I reserved 1/4 cup of the chocolate chips to press into the tops of dough balls before baking, just for looks which is totally optional).
Shape dough into balls, 1-2 tbsp each, then transfer to parchment paper lined baking sheets, spacing cookies 2 inch apart.
Bake in preheated oven 15 mins until edges are lightly golden. Cool on baking sheet 2 minutes then transfer to a wire rack to cool completely. Store in airtight container.