Ingredients
Equipment
Method
Prepare zucchini and oven
- Preheat the oven to 350°F and position a rack in the lower-middle; line and grease a 9×5-inch loaf pan.
- Shred the zucchini on the large side of a box grater, place in a clean towel, and squeeze until only slightly damp; measure about 1 3/4 to 2 cups squeezed zucchini and set aside.
Melt chocolate and mix wet ingredients
- Place the chopped chocolate and oil in a heatproof bowl and microwave in 20-second bursts, stirring until smooth and warm, or melt over a double boiler; whisk in the sugar, then the egg, then vanilla until glossy.
Combine dry and fold
- Whisk together the flour, cocoa, baking soda, baking powder, and salt in a separate bowl, then add the dry mix to the chocolate mixture and fold with a rubber spatula until almost combined; fold in the drained zucchini and optional walnuts or chips gently.
Bake
- Transfer batter to the prepared pan and smooth the top; sprinkle turbinado sugar if using and bake at 350°F for 50–60 minutes, checking at 45 minutes—a toothpick should come out with moist crumbs, not wet batter.
- Remove from oven, rest in pan for 15 minutes, then lift out with parchment and cool on a wire rack at least 45 minutes before slicing.
Notes
Drain shredded zucchini well to avoid a gummy center; a clean towel squeeze for 30 seconds works. Use a 9×5 loaf pan and check for doneness with a toothpick—the center should have moist crumbs. For mini-loaves, divide batter into three small pans and reduce bake time to 35-40 minutes.
