Preheat the oven to 350 degrees. Coat a muffin tin with cooking spray.
Combine flour, cocoa powder, baking soda, baking powder, salt and cinnamon in a bowl, stir until well combined. Add chocolate chips and mix
Whisk together eggs, oil, sugars and vanilla until well combined. Add zucchini and mix. Slowly add the flour mixture to the sugar mixture until just combined. Spoon evenly into muffin tins.
Bake for 20-25 minutes or until a tester inserted into the center comes out clean. Remove from the oven and let cool for a few minutes before placing on a cooling rack to continue cooling. Serve and enjoy.