Preheat oven to 350° F and grease a 9x5 inch loaf pan with cooking spray.
Place the sugar, oil and eggs in a mixing bowl, and beat with a mixer on low speed until well-blended. You can also use a hand mixer. Add the applesauce and stir to combine.
In a medium bowl, combine flour, cocoa, baking powder, cinnamon and salt and whisk to combine.
Pour the bowl of dry ingredients (flour mixture) into the bowl of wet ingredients (sugar mixture) and beat with the mixer on low speed just until moist and everything is combined. Stir in the shredded zucchini and chocolate chips.
Transfer the batter into the prepared loaf pan and bake at 350° F for 1 hour or until toothpick inserted in center comes out clean.
Cool in the pan for 10 minutes before removing and slicing.
I drizzled melted caramel chocolate chips on top for an extra sweet treat.