Preheat your oven to 350°F and line a muffin pan.
In a bowl, mix flour, cocoa, baking soda, and salt.
In another bowl, whisk sugar, oil, eggs, vanilla, and milk.
Add the dry ingredients to the wet and mix gently.
Stir in zucchini and chocolate chips.
Scoop the batter into muffin cups (about ¾ full).
Bake for 18-22 minutes or until a toothpick comes out clean.
Let them cool a little, then enjoy!