In a medium bowl combine flour, cocoa powder, baking powder, baking soda, salt, and cinnamon. In a separate bowl, whisk together oil and both sugars. Add flax eggs, milk, and vanilla extract. Stir to combine. Fold in shredded zucchini. In a separate bowl, whisk together oil and both sugars. Add flax eggs, milk, and vanilla extract. Stir to combine. Fold in shredded zucchini.