Preheat oven to 350 degrees.
In a medium to large mixing bowl mix together the sugar and butter until combined. Mix in the eggs until mixture is creamy and blended.
Stir in the vanilla and zucchini.
On top of the wet ingredients place the cocoa powder, flour, salt, and baking powder. Stir until all the ingredients are combined and batter is rich and chocolately.
Slowly stir in the chocolate chips.
Pour into a 9-inch baking pan and bake for 23 - 25 minutes or until you can insert a toothpick and crumbs stick to it. You don't want to overcook the brownies or they will be dry. My brownies cook perfect at 24 minutes but it depends on your oven.
Take out of the oven and let sit for 1/2 hour to 1-hour. Cut into 16 squares and enjoy.