Preheat oven to 350 degrees F. Coat a 9x5 inch loaf pan or 4 small loaf pans with cooking oil then dust with flour.
Whisk milk, eggs, sugar, oil and vanilla in a medium bowl.
Stir in zucchini. Combine flour, baking powder, cinnamon and salt in a large bowl.
Add the wet ingredients and chocolate chips to the dry ingredients.
Stir until combined.
Transfer the batter into the prepared pan and bake until golden brown. You can test with a wooden tooth pick, it is done and when it comes out clean, 50 minutes to an hour.
Let cool in the pan for 10 minutes and then turn out onto a wire rack.
Cool for one hour before slicing. Enjoy!