Using a box grater or food processor, shred zucchini (about 1 medium size, 6-7 in long) until you have a coarsely shredded mixture. You should have 1 packed cup of zucchini.
Preheat your oven to 350 degrees fahrenheit and grease a 9x5 in loaf pan with cooking spray.
In a large bowl, whisk together the flour, cocoa powder, sugar, baking powder, baking soda, salt, cinnamon and instant coffee.
To the dry ingredients, add the eggs, mashed banana, shredded zucchini and vanilla extract. Stir gently to combine and then fold in chocolate chips.
Spread the batter into the prepared loaf pan and sprinkle extra chocolate chips on top if desired. Place in the preheated oven and bake 55-65 minutes or until a knife inserted into the center comes out clean.
Allow to cool before enjoying.
Notes
*Store leftover slices in an airtight container in the fridge for up to 3 days. After 3 days, place slices in the freezer and freeze for up to 3 months. Be sure to thaw bread in the microwave or overnight in the fridge before eating.*You can turn this loaf into muffins if you wish. Simply grease 18 muffin cups (you will need a 12-count muffin tin and a 6-count muffin tin or you will need to bake in batches) and divide the batter evenly. Bake at 350 degrees for about 18 minutes.**I love making this loaf with just 1/2 cup of sugar, but, if you prefer a sweeter bread, you can increase the sugar to 1 cup.