01 -
Preheat the oven to 350ºF and grease a 9x13 inch pan.
02 -
Mix together the grated zucchini, brown sugar, applesauce, eggs, and vanilla extract in a large bowl.
03 -
Stir together the flour, cocoa powder, baking soda, baking powder, cinnamon, and salt in a separate bowl, then gradually add to the wet ingredients and mix until just combined.
04 -
If using, fold in the chocolate chips and nuts.
05 -
Pour the batter into the prepared pan and bake for approximately 55 minutes, or until a toothpick inserted into the center comes out clean.
06 -
If desired, melt chocolate chips, butterscotch chips, and peanut butter together for frosting or spread Nutella on top of the cooled brownies.