Healthier Zucchini Brownies

Preheat the oven to 350 degrees F (175 degrees C). Coat a 9x13-inch baking dish with cooking spray.

Puree zucchini in a high-powered blender or food processor. Measure out 2 cups of zucchini puree, then add prunes until level hits 3 cups. Return to the blender and process. Add brown sugar, cocoa, oil, salt, and vanilla extract; blend until totally smooth.

Whisk whole wheat flour, all-purpose flour, and baking soda together in a bowl. Stir in nuts. Pour chocolate mixture into flour mixture and stir together as gently as possible; batter will be very thick.

Spread batter into the prepared baking pan and smooth as much as you'd like; this batter will not smooth out much as it bakes. Sprinkle Demerara sugar and chocolate chips on top.

Bake in the preheated oven until brownies just spring back when touched in the middle or a toothpick comes out clean, about 30 minutes. Allow to cool before devouring.