Recipe: Whole-wheat zucchini brownies

Ingredients

• 1 cup white whole-wheat flour
• 1/3 cup baking cocoa
• 1-1/4 teaspoons baking soda
• 1/2 teaspoon coarse salt
• 1 cup dark chocolate morsels, divided
• 1/4 cup vegetable oil
• 1/2 cup packed light brown sugar
• 1/2 cup granulated sugar
• 2 large egg whites
• 1 teaspoon vanilla extract
• 1-1/2 cups grated zucchini (about 3 medium)