Preheat your oven to 350 degrees. Prepare a baking sheet with parchment paper or lightly grease the baking sheet.
Whisk together dry ingredients: flour, baking soda, salt, and cinnamon.
In a separate bowl or stand mixer, combine butter and sugars, mix until smooth. Add egg and vanilla extract. Then stir in the shredded zucchini.
Slowly add flour mixture until just combined. Using a wooden spoon stir in oats, and chocolate chunks.
Using a small scoop or tablespoon scoop out the dough (about 2 tablespoons each) onto baking sheets, spacing them a couple inches apart. Bake for 12-15 minutes or until golden. Remove cookies from pans and let cool on wire racks.