Preheat the oven to 350 degrees. Grease the bottom and sides of an 8 x 8 pan or line with parchment paper. (I used glass baking dish so I can see if the brownies are getting to dark or burning.) With a grater or in a mini food prep, grate the zucchini fine. In a bowl, mix together zucchini, egg almond butter, honey, maple syrup and vanilla until well combined. Combine cocoa powder, baking powder, baking soda and salt. Add to wet ingredients and mix to combine well. Place chopped chocolate bar in a microwave-safe bowl. Heat at 30 second intervals until melted. Let cool for a few minutes, and then mix into the brownie mixture. Fold in the mini chocolate chips. Pour the batter into the prepared baking pan. Sprinkle 1/4 cup chocolate chips over top. Bake for about 35-40 minutes or until toothpick comes up clean. Remove from oven and about 10 minutes later, cover with plastic wrap or aluminum foil while they are still warm. Allow them to cool completely at room temperature. Place in refrigerator for 2-3 hours to harden.