Preheat your oven to 350°F (175°C) and grease an 8x8-inch baking pan.
Grate the zucchini and set it aside to drain excess moisture.
In a mixing bowl, combine the flour, cocoa powder, baking soda, and salt.
In another bowl, whisk together sugar, eggs, vegetable oil, and vanilla extract.
Gradually fold the dry ingredients into the wet mixture until just combined.
Gently fold in the grated zucchini and chocolate chips.
Pour the batter into the prepared pan, spreading it evenly.
Bake for 25 minutes or until a toothpick inserted comes out clean.
Let the brownies cool in the pan for 10 minutes.
Cut into squares and serve warm or at room temperature.