Preheat oven to 350°F and spray a 9-by-5-inch loaf pan with nonstick cooking spray and line with overhanging pieces of parchment paper for easy removal
In a medium bowl, whisk the flour, cocoa powder, baking soda, baking powder and salt, and set aside.
In a large mixing bowl, using a hand mixer or a whisk, beat the oil, sugars, eggs, instant coffee, and the vanilla until blended, about 2 minutes.
Whisk the shredded zucchini into the wet ingredients until combined.
Then add the dry ingredients to the wet ingredients mixing/stirring until just combined
Fold in nuts and chocolate chucks or chips if using.
Spoon batter into the loaf pan and smooth the top. Top with a few extra chocolate chips if using
Bake 55 to 65 minutes, or until a knife or toothpick inserted into the center of the bread comes out clean or mostly clean. Tent loosely with aluminum foil if browning too quickly
When the bread is done, cool in the pan on a wire rack for 10 minutes. Turn out the loaf onto the rack to finish cooling.
For the dark chocolate ganache (optional)