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Rich moist chocolate zucchini bread loaf sliced on a plate with a dark crumb and visible chocolate chips

Chocolate Zucchini Bread That's Rich, Moist, and Actually Tastes Like Chocolate

This is the chocolate zucchini bread that converted a skeptic. Two kinds of chocolate, a ten-minute salt rest for the zucchini, and a loaf that looks like it cost $6 a slice but costs about $0.80 per serving. Fudgy, moist, and bakery-level from a $1.29 vegetable.
Prep Time 20 minutes
Cook Time 1 hour 10 minutes
Total Time 1 hour 30 minutes
Course Breakfast, Dessert, Snack
Cuisine American
Servings 10
Calories 265 kcal

Equipment

  • 9x5-inch loaf pan
  • Box grater
  • Large Mixing Bowl
  • Small Mixing Bowl
  • Whisk
  • Rubber Spatula
  • Parchment Paper

Ingredients
  

For the Zucchini

  • cups shredded zucchini (from about 1 medium zucchini)

Dry Ingredients

  • 1 cup all-purpose flour
  • ½ cup natural unsweetened cocoa powder
  • 1 tsp baking soda
  • ½ tsp baking powder
  • ½ tsp salt

Wet Ingredients

  • 2 large eggs
  • ¾ cup brown sugar, packed
  • ¼ cup granulated sugar
  • ½ cup neutral oil (like avocado or canola)
  • ¼ cup melted butter
  • ¼ cup buttermilk (or milk + 1 tsp vinegar)
  • 1 tsp vanilla extract

Chocolate

  • 3 oz bittersweet chocolate, melted and slightly cooled

Optional

  • ½ cup chocolate chips

Instructions
 

  • Prep the zucchini: Shred it using a box grater or food processor. Toss with ½ teaspoon salt and let it sit in a fine-mesh strainer over a bowl for 10 minutes. Then grab handfuls and squeeze firmly over the sink — you'll be surprised how much liquid comes out. This step is non-negotiable for a loaf that bakes up tender, not wet.
  • Preheat and prep the pan: Preheat your oven to 350°F. Line a 9x5-inch loaf pan with parchment paper, leaving a 2-inch overhang on the long sides. Lightly grease the ends with butter or oil.
  • Mix the dry ingredients: In a medium bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt. Set aside.
  • Mix the wet ingredients: In a large bowl, whisk the eggs, brown sugar, and granulated sugar together until smooth and slightly thickened — about 30 seconds. Stream in the oil and melted butter while whisking. Add the buttermilk and vanilla, and whisk until combined.
  • Add the melted chocolate: Pour the slightly cooled melted chocolate into the wet ingredients and whisk until the batter is smooth and glossy. This is where the loaf starts to feel like something special.
  • Combine dry and wet: Add the dry ingredients to the wet mixture and fold gently with a rubber spatula until just combined — a few streaks of flour are fine. Overmixing develops gluten and makes the bread tough.
  • Fold in the zucchini: Add the squeezed, dry zucchini to the batter and fold until evenly distributed. The batter will be thick and luscious. Fold in the optional chocolate chips if using.
  • Bake: Scrape the batter into the prepared pan and smooth the top. Bake for 50-60 minutes, or until a skewer inserted in the center comes out with a few moist crumbs attached (not raw batter). If the top is browning too quickly at the 40-minute mark, tent loosely with foil.
  • Cool completely: Let the loaf cool in the pan on a wire rack for 15 minutes. Then lift it out using the parchment overhang and let it cool completely before slicing — at least 1 hour. I know the smell is intoxicating. I know. But slicing it warm will give you a crumbly mess. Trust the process.

Notes

Storage: Wrap tightly in plastic or keep in an airtight container at room temperature for up to 4 days. For longer storage, freeze the completely cooled loaf wrapped in plastic then foil for up to 3 months. Thaw individual slices in the microwave for 15 seconds.
Dairy-Free: Use melted coconut oil instead of butter and a dairy-free milk mixed with vinegar instead of buttermilk.
Gluten-Free: Swap all-purpose flour with a 1:1 gluten-free baking blend (like Bob's Red Mill). The texture will be slightly more tender but equally delicious.
Key tip: Don't skip the salt rest on the zucchini — it draws out excess water and ensures a tender, not gummy, crumb.
Keyword chocolate loaf, chocolate zucchini bread, zucchini bread recipe