Preheat oven to 350°F (175°C). Wash and grate zucchini using large holes of box grater. Place grated zucchini in clean kitchen towel and squeeze firmly to remove excess moisture.

In large mixing bowl, cream together softened butter, white sugar, and brown sugar until light and fluffy (2-3 minutes). Beat in egg and vanilla essence until well combined.

In separate bowl, whisk together flour, cinnamon powder, baking soda, and salt.

Add flour mixture to butter mixture, stirring just until combined. Don't overmix. Fold in prepared zucchini, quick oats, chocolate pieces, and pecans if using.

Drop rounded tablespoons of dough onto ungreased baking sheets, spacing 2 inches apart. Bake 12-15 minutes until edges are lightly golden but centers still look slightly underdone.

Cool on baking sheet for 5 minutes before transferring to wire rack.