Double Chocolate Zucchini Bread
Why You’ll Love This Recipe
I still remember the first loaf of Double Chocolate Zucchini Bread I ever attempted. I was so excited to sneak some veggies into my kidsβ breakfast that I completely forgot to squeeze the water out of the shredded zucchini. The result was a soggy, sunken mess that tasted more like a wet sponge than chocolate cake. It was a hard lesson, but it taught me the most important secret to this recipe: you have to get that zucchini really, really dry.
After dozens of tests, I finally cracked the code. This Double Chocolate Zucchini Bread is the perfect balance of rich, fudgy chocolate and a tender, moist crumb. It is not a dry, crumbly loaf. It is dense and almost brownie-like, but still light enough to eat for a snack. The shredded zucchini disappears completely into the batter, adding moisture and nutrients without any weird texture. My family cannot tell there is a vegetable in here, and I love that. For more on the science of using vegetables in baking, check out this Wikipedia article on zucchini to understand its high water content.
Ingredients
- 1 and 3/4 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
- 1/2 cup granulated sugar
- 1/2 cup packed light brown sugar
- 1/2 cup vegetable oil
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 and 1/2 cups shredded zucchini (from about 1 medium zucchini)
- 1/2 cup sour cream
- 1 cup semisweet chocolate chips
Step-by-Step Directions
- Get the oven preheating to 350 degrees Fahrenheit. Grease a 9×5 inch loaf pan really well with butter or nonstick spray. I like to line the bottom with a strip of parchment paper that hangs over the long sides to make lifting the bread out easy later.
- This is the most important part. Take your shredded zucchini and dump it into the center of a clean kitchen towel or a few layers of paper towels. Gather the edges and twist it tight over the sink. Squeeze and squeeze until barely any water drips out. You want the zucchini to feel almost dry and crumbly. Set it aside.
- In a large bowl, whisk the flour, cocoa powder, baking soda, baking powder, salt, and cinnamon together. Make sure there are no lumps of cocoa powder.
- In a separate big bowl, whisk the granulated sugar, brown sugar, and oil together until they are combined and look like wet sand. Crack in the eggs one at a time, whisking well after each one. Stir in the vanilla.
- Fold the dry ingredients into the wet ingredients using a rubber spatula. Stir just until you see a few streaks of flour left. Do not overmix.
- Gently fold in the squeezed zucchini and the sour cream. The batter will look thick and a little bit weird, but that is normal.
- Finally, fold in the chocolate chips. Save a handful to press onto the top of the batter after you pour it into the pan.
- Scrape the batter into the prepared loaf pan and smooth the top. Press those reserved chocolate chips onto the surface.
- Bake for 50 to 60 minutes. The bread is done when a toothpick inserted into the center comes out with just a few moist crumbs attached. If it starts browning too fast after 40 minutes, tent a piece of foil loosely over the top.
- Let the bread cool in the pan on a wire rack for 15 minutes. Then use the parchment paper to lift it out and let it cool completely on the rack before slicing. This is the hardest part.
Pro Tips for Success
Do not skip the step of squeezing the water out of the zucchini. If you leave the moisture in, your Double Chocolate Zucchini Bread will be heavy and gummy instead of light and tender. The sour cream also adds a ton of moisture and a slight tang that makes the chocolate flavor pop. If you want to understand more about how sour cream affects baking, read this Wikipedia article on sour cream. Another tip is to use a high-quality cocoa powder. I prefer Dutch-process for a deeper, more mellow chocolate taste, but natural works fine too. Finally, let the bread cool completely. Cutting it while it is warm will make it fall apart.
Servings and Timing
This recipe makes one 9×5 inch loaf, which gives you about 10 generous slices. The total time from start to finish is about 1 hour and 20 minutes, including 10 minutes of prep and 10 minutes of cooling time before you can even think about slicing it.
Variations and Substitutions
If you want to make this a bit healthier, you can swap half the all-purpose flour for whole wheat pastry flour. The texture will be a little denser but still delicious. For a dairy-free version, use a plant-based sour cream and dairy-free chocolate chips. You can also add a handful of chopped walnuts or pecans for some crunch. If you are out of sour cream, plain full-fat Greek yogurt works perfectly as a substitute. To make this gluten-free, use a good 1-to-1 gluten-free baking flour blend that contains xanthan gum. I have also tried adding a teaspoon of instant espresso powder to the dry ingredients to deepen the chocolate flavor, and it is amazing.
What to Serve With This
This Double Chocolate Zucchini Bread is wonderful on its own, but it is even better with a tall glass of cold milk or a hot cup of coffee. If you want to turn it into a full breakfast or snack spread, try pairing it with a batch of Protein Zucchini Brownies for a double dose of hidden veggies. For a savory contrast, these Zucchini Boat Recipes Stuffed With Cheese are a fantastic way to use up the rest of your zucchini.
Storage and Reheating
Store any leftover Double Chocolate Zucchini Bread in an airtight container at room temperature for up to 4 days. It actually gets even more moist and flavorful on the second day. You can also wrap it tightly in plastic wrap and then foil and freeze it for up to 3 months. To thaw, just leave it on the counter for a few hours or pop individual slices in the microwave for about 15 seconds. If you want to reheat a slice to get that fresh-from-the-oven texture, toast it in a toaster oven or air fryer at 300 degrees Fahrenheit for 3 to 4 minutes.
FAQs
Why did my Double Chocolate Zucchini Bread sink in the middle?
This usually happens if the zucchini was too wet or if the bread was underbaked. Make sure you squeeze the zucchini very dry and always test with a toothpick in the center. If the toothpick comes out with wet batter, it needs more time.
Can I use frozen shredded zucchini for this recipe?
Yes, but you must thaw it completely first and then squeeze it very dry. Frozen zucchini releases a lot of water when it thaws, so you will need to press it really hard to get the liquid out. Otherwise, your bread will be soggy.
My bread turned out greasy on the bottom. What did I do wrong?
This can happen if you used too much oil or if the oil was not fully incorporated into the sugar and eggs. Make sure you whisk the oil and sugars together until they look like a thick paste before adding the eggs.
Can I bake this in a different pan, like a muffin tin?
Absolutely. For Double Chocolate Zucchini Muffins, grease a 12-cup muffin tin and fill each cup about three-quarters full. Bake at 350 degrees Fahrenheit for 18 to 22 minutes, or until a toothpick comes out clean. You will get about 12 to 14 muffins from this batter.
What happens if I accidentally used baking soda instead of baking powder?
That would be a big problem. Baking soda needs an acid to react, and while the sour cream and cocoa powder provide some, the ratio would be off. Your bread would likely taste metallic and not rise properly. Always double check your labels.
Conclusion
Honestly, this Double Chocolate Zucchini Bread is the reason I look forward to zucchini season every year. It feels like a cheat, getting to eat a slice of rich, fudgy chocolate bread that also has a vegetable hiding inside. I hope you give this recipe a try and see how easy it is to make something so decadent feel a little bit virtuous. I would love to hear how it turns out for you, so please leave a comment and let me know if your family noticed the zucchini or not.
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