- 1½ cups all-purpose flour
- ½ cup unsweetened cocoa powder
- 1 teaspoon baking soda
- ½ teaspoon baking powder
- ½ teaspoon salt
- 1 teaspoon ground cinnamon (optional)
- 2 large eggs
- ¾ cup granulated sugar
- ¼ cup packed brown sugar
- ½ cup neutral oil (vegetable oil or melted coconut oil)
- 1 teaspoon vanilla extract
- 2 cups shredded zucchini, gently squeezed but not bone dry (about 2 medium zucchini)
- 1 cup semisweet chocolate chips, plus extra for topping