Preheat oven to 350 degrees.
Grease two 8" x 4" pans, or 6 mini loaf pans, and set aside.
In a large mixing bowl, combine the shredded zucchini (squeezed of excess moisture), sugar, eggs, cocoa, melted butter, and lemon juice and mix well.
In a separate mixing bowl, combine the flour, cinnamon, salt, baking powder, baking soda, and allspice and whisk together.
Combine the flour mixture with the zucchini mixture and stir together with a rubber spatula, mixing just until combined. Add chocolate chips and mix again.
Divide the batter evenly between your prepared bread pans, then sprinkle a few extra chocolate chips on top of each loaf (optional).
Bake in a preheated 350 degree oven for 50-60 minutes (mini loaves for 35-40 minutes), or until a toothpick inserted into the center comes out clean and the internal temperature reaches 200 degrees F.
Remove from the oven and cool on a wire rack for 20 minutes, then gently run a knife around the edges of the bread and tease the bread out of the pan. Enjoy!