Preheat oven to 350º
If using paper liners for the muffin tin set them up now, and set the pan aside
Otherwise lightly grease the muffin tin and set aside
Shred zucchini and set aside
In a large mixing bowl, whisk sugar, eggs, oil, and vanilla together
Add flour, baking soda, salt, and cinnamon, and mix together. The batter will be somewhat dry
Add zucchini, and stir until fully incorporated, and the batter is no longer lumpy
Stir in chocolate chips
Pour into greased or paper lined muffin tin
Sprinkle with extra chocolate chips if desired
Bake in center of oven for 18 minutes, until a toothpick inserted into the center comes out clean if you can manage to avoid a chocolate chip
Remove from oven and let cool