▢2 ½ cups flour ▢½ cup cocoa ▢½ teaspoon baking powder ▢1 ½ teaspoon baking soda ▢2 teaspoon cinnamon ▢¾ cup softened butter ▢½ teaspoon salt ▢2 cups sugar ▢3 eggs ▢2 teaspoon vanilla ▢2 teaspoon orange peel ▢2 cup zucchini ▢½ cup milk ▢2 cups chocolate chips optional