Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or grease it lightly with cooking spray.
In a large mixing bowl, combine the grated zucchini, applesauce, eggs, vegetable oil, and vanilla extract. Whisk until well combined.
In another bowl, mix together the all-purpose flour, whole wheat flour, granulated sugar, brown sugar, baking soda, baking powder, salt, and cinnamon. Stir until blended.
Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. Be careful not to overmix; it’s okay if a few lumps remain.
Fold in the chocolate chips until evenly distributed throughout the batter.
Scoop the batter into the prepared muffin tin, filling each cup about 2/3 full.
Bake in the preheated oven for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Once baked, remove the muffins from the oven and allow them to cool in the pan for about 5 minutes before transferring them to a wire rack to cool completely.
Notes
Serve warm with a sprinkle of powdered sugar or cream cheese spread.