Preheat oven to 350 degrees
Grease or line muffin tins
Whisk together in a large bowl; white and wheat flour, cocoa powder, baking powder, and salt
Mix together in another bowl; milk, honey, and applesauce
Add egg to wet ingredients and gently mix until combined
Fold wet ingredients into the dry ingredients and mix until just combined; a few lumps are okay
Add grated zucchini and chocolate chips; gently fold in until combined throughout batter
Scoop batter into muffin tins, fill about 3/4 full
Bake at 350 degrees for 15 to 20 minutes for regular sized muffin tins. Bake for 10 minutes for mini muffins. Or until toothpick inserted comes out clean.
Remove from oven and cool on wire rack for 5 minutes
Remove from muffin tins and serve
Store any leftovers in airtight container