Preheat your oven to 350°F (175°C) and grease a baking pan.
In a large bowl, combine the grated zucchini, sugar, and vegetable oil.
Add the eggs and vanilla extract, mixing well.
In a separate bowl, whisk together the flour, cocoa powder, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined.
Fold in chocolate chips if desired.
Pour the batter into the prepared baking pan, spreading it evenly.
Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
Allow to cool in the pan for 10 minutes before transferring to a wire rack.
Cut into squares and enjoy your delicious zucchini brownies!