Preheat oven to 170 degree C. Line a 9x5 inch loaf pan with parchment paper and grease them well with oil. Set aside.
Take eggs, brown sugar, honey, vanilla, oil in a bowl and whisk till mixed.
Take flour, cocoa powder, baking powder and baking soda in a bowl and whisk well.
Now add the dry ingredients into the wet mix and fold gently.
Add in grated zucchini and chocolate chips and fold gently.
Spoon this in the baking pan and bake for 60 to 65 mins. Insert a toothpick to check whether the cake is done, if it comes out clean then it is done.
If you see the cake colouring too fast in cover, place a foil on top of the cake and continue baking,
Remove the cake from oven and cool completely.
Now remove from pan and slice into pieces
Serve.