In a bowl, fluff the flour along with baking soda, sugar, cocoa powder.
Add in the melted butter, apple puree, chocolate chips, mix gently.
Next, add the grated zucchini and mix. In the beginning, you will feel that liquid is not enough. However, once you combine everything the batter will be loose.
Grease a muffin tray and fill to half. Microwave for a minute and again for 30 secs.
Let it sit for another 2 to 3 mins before removing.