Chocolate Zucchini Bread Recipe

Every summer, zucchini piles up on the counter, and this chocolate zucchini bread is the delicious solution. It’s rich, tender, and packed with chocolate flavor—no one will guess there’s a vegetable inside.

If you’ve got a garden that’s producing more zucchini than you can grill or sauté, this recipe puts it to work. The loaf comes out moist and deeply chocolatey, closer to a brownie than a quick bread.

It takes about 15 minutes to pull together and uses one bowl for the dry ingredients and one for the wet. That’s it. No mixer, no fuss.

Why This Recipe Works

Zucchini adds moisture without making the bread taste vegetal, so you get a soft, brownie-like crumb. Cocoa powder and chocolate chips deliver deep chocolate flavor in every slice. A simple one-bowl method means less cleanup and a quick path to baking.

Servings: 4 | Prep time: 15 minutes | Cook time: 50 minutes | Total time: 65 minutes

Ingredients

• 1 1/2 cups all-purpose flour
• 1/2 cup unsweetened cocoa powder
• 1 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 1 teaspoon ground cinnamon
• 3/4 cup granulated sugar
• 1/4 cup packed light brown sugar
• 2 large eggs, room temperature
• 1/2 cup vegetable oil
• 1/4 cup plain Greek yogurt (or sour cream)
• 1 teaspoon vanilla extract
• 2 cups grated zucchini (about 2 medium, unpeeled)
• 1 cup semi-sweet chocolate chips, divided

Instructions

1. Preheat and Prep: Preheat oven to 350°F (175°C). Grease a 9×5-inch loaf pan and line with parchment paper, leaving overhang for easy removal.
2. Grate and Drain Zucchini: Grate zucchini on the large holes of a box grater. Place in a clean kitchen towel and squeeze firmly over the sink to remove excess water—you should end up with about 1 1/2 cups packed. Set aside.
3. Whisk Dry Ingredients: In a large bowl, whisk together flour, cocoa powder, baking soda, baking powder, salt, and cinnamon until no streaks of cocoa remain.

4. Mix Wet Ingredients: In a medium bowl, whisk granulated sugar, brown sugar, eggs, oil, Greek yogurt, and vanilla until smooth and slightly thickened, about 1 minute.
5. Combine and Fold: Pour wet ingredients into dry and stir with a spatula until just combined—a few streaks of flour are okay. Fold in grated zucchini and 3/4 cup chocolate chips. Do not overmix.
6. Bake: Scrape batter into prepared pan and smooth top. Sprinkle remaining 1/4 cup chocolate chips over the surface. Bake for 50-60 minutes, until a toothpick inserted into the center comes out with a few moist crumbs. Tent with foil after 40 minutes if browning too quickly.

7. Cool and Serve: Let bread cool in pan for 15 minutes, then use parchment overhang to lift onto a wire rack. Cool completely before slicing—this helps the crumb set. Slice with a serrated knife.

Tips & Variations

• Squeeze the zucchini well: too much liquid makes the bread gummy. You want it damp, not dripping.
• For a deeper chocolate flavor, swap 1/4 cup of the flour with dark cocoa powder or add 1 teaspoon espresso powder.
• No Greek yogurt? Use sour cream or buttermilk. If using buttermilk, reduce oil to 1/3 cup.
• Add 1/2 cup chopped nuts (walnuts or pecans) for crunch. Toast them first for extra flavor.
• Make muffins: divide batter into 12 lined muffin cups and bake at 350°F for 20-25 minutes.
• For a lighter texture, replace 1/2 cup all-purpose flour with white whole wheat flour.
• Don’t overbake! The bread should feel slightly soft in the center and a toothpick should have moist crumbs, not wet batter.

Storage & Make-Ahead

Store cooled bread wrapped tightly in plastic wrap at room temperature for up to 3 days, or refrigerate for up to 1 week. For longer storage, wrap individual slices in plastic wrap and freeze in a zip-top bag for up to 3 months. Reheat slices in the microwave for 15-20 seconds or toast in a toaster oven.

Nutrition Information

• Calories: 420
• Carbohydrates: 52 g
• Protein: 6 g
• Fat: 22 g
• Saturated Fat: 6 g
• Fiber: 3 g
• Sugar: 30 g
• Sodium: 220 mg

Nutrition values are an estimate and will vary based on exact ingredients and portion size.

FAQs

Can I use frozen zucchini?

Yes, but thaw and drain it thoroughly first. Frozen zucchini releases more water, so squeeze it very well—otherwise the bread may be soggy.

Do I need to peel the zucchini?

No, peeling is not necessary. The skin is thin and blends right in, adding moisture and a few extra nutrients without affecting the taste.

Why is my chocolate zucchini bread dry?

Dryness usually comes from overbaking or not measuring flour correctly. Spoon flour into the measuring cup and level it off; also check the bread a few minutes before the minimum bake time.

Should I use a metal or glass loaf pan?

Either works, but they bake differently. A light-colored metal pan is the most predictable choice and gives the most even browning. Dark metal pans and glass pans absorb and hold more heat, so the loaf can brown—or even burn—on the bottom before the center cooks through. If that’s all you have, drop the oven temperature to 325°F and start checking for doneness around the 45-minute mark.

Can I make this chocolate zucchini bread gluten-free?

Yes, with one adjustment. Use a 1:1 gluten-free all-purpose blend that already contains xanthan gum rather than a single flour like almond or coconut flour, which behave very differently. Expect the loaf to be slightly denser and a touch more crumbly, and let it cool completely—gluten-free baked goods firm up as they cool, so slicing early will make it fall apart.