A moist and rich chocolate zucchini bread with grated zucchini and sour cream or Greek yogurt for a tender crumb, loaded with cocoa powder and semisweet chocolate chips.
Grate zucchini very finely and squeeze out excess moisture to prevent sogginess but retain moisture within the bread., Do not overmix the batter to avoid a dense, tough texture., Check the bread starting at 55 minutes; it should be done when a toothpick comes out with moist crumbs but no raw batter., Cooling in the pan for 10 minutes before removing helps keep the loaf moist and firm., The recipe is flexible: whole wheat flour can be used for a nuttier, denser loaf., Add up to 1 cup total of chopped nuts, dried fruits, or shredded coconut as mix-ins with or instead of chocolate chips., Grated carrots or mashed bananas can be substituted for zucchini., The bread can be stored in an airtight container at room temperature for up to 3 days, or frozen tightly wrapped for up to 3 months., Sugar can be reduced up to 25%, but may affect texture and moisture., This batter can also be used to make muffins; bake muffins at 350°F (175°C) for 18–25 minutes, watching closely from 18 minutes onward.