Preheat oven at 350°F.
Wash the zucchinis. Cut the top and bottom off.
Finely grate the zucchinis.
Squeeze the grated zucchinis. Discard the juice left behind.
Set aside the squeezed grated zucchini for later.
Add flour, baking soda, salt, cinnamon, and cocoa powder to a bowl. Mix fully.
Add the sugar. Mix thoroughly.
Crack the eggs. Whisk together.
Pour in the oil, whisked eggs, and vanilla.
Combine to form a dry dough.
Mix in the grated zucchini and chocolate chips. The batter should become runny.
Place baking cups in a muffin pan.
Measure out 1/3 cup of batter and pour into each baking cup.
Bake for 30 minutes in the oven.
Remove when done.
Place on a baking rack to cool.
Serve warm or cooled.
Add chocolate chips on top for extra chocolate [optional].