Moist Chocolate Zucchini Banana Bread

Finding a way to use up summer zucchini that your kids will actually eat can feel like an impossible task. After all, most children aren’t exactly jumping for joy at the sight of green vegetables, and when you’ve got a garden overflowing with zucchini or a great deal at the farmer’s market, you need recipes that make those veggies disappear fast.

That’s where this chocolate zucchini banana bread comes in: it’s basically a chocolate lover’s dream that secretly sneaks in vegetables, uses up those overripe bananas sitting on your counter, and tastes more like dessert than anything remotely healthy.

What Kind of Zucchini Should I Use?

For this bread, medium-sized zucchinis work best since they’re easier to shred and have fewer seeds than the really large ones. You’ll want to use fresh zucchini rather than frozen, as frozen zucchini releases way too much water and can make your bread soggy. After shredding your zucchini, make sure to pat it dry with paper towels or a clean kitchen towel to remove excess moisture – this is a really important step that’ll keep your bread from turning out too wet. Green or yellow zucchini both work equally well, so just use whatever you can find at the store or have growing in your garden.

Options for Substitutions

This recipe is pretty forgiving, so here are some swaps you can make if needed:

• All-purpose flour: You can use whole wheat flour for a heartier texture, but swap only half the amount (use 3/4 cup whole wheat and 3/4 cup all-purpose) or your bread might turn out dense. Gluten-free 1-to-1 baking flour works too.
• Vegetable oil: Melted coconut oil, canola oil, or even melted butter work just fine. If using butter, let it cool slightly before mixing with the other ingredients.
• Granulated and brown sugar: You can use all brown sugar for a moister bread with deeper flavor, or all white sugar if that’s what you have. Coconut sugar works as a 1-to-1 swap for either.
• Zucchini: Yellow squash works just as well as zucchini. Make sure to pat it dry with paper towels to remove excess moisture before adding it to the batter.
• Bananas: In a pinch, you can use 3/4 cup unsweetened applesauce instead of bananas, though you’ll lose some of that banana flavor.
• Chocolate chips: Feel free to use dark chocolate chips, milk chocolate, or even chopped chocolate bars. Walnuts or pecans make a nice addition or replacement if you want some crunch.

Watch Out for These Mistakes While Baking

The biggest mistake when making chocolate zucchini banana bread is skipping the step of patting your shredded zucchini dry with paper towels – all that extra moisture can make your bread dense and gummy instead of tender.

Another common error is overmixing the batter once you add the dry ingredients to the wet mixture, which develops too much gluten and results in a tough loaf, so stir just until the flour disappears.

Make sure your bananas are truly ripe with plenty of brown spots, as underripe bananas won’t add enough sweetness or moisture to balance the cocoa powder.

To avoid a raw center, start checking for doneness at the 45-minute mark by inserting a toothpick into the middle – it should come out with just a few moist crumbs, not wet batter, and remember that the chocolate chips might make it look slightly underdone even when it’s perfectly baked.

What to Serve With Chocolate Zucchini Banana Bread?

This bread is perfect for breakfast or an afternoon snack with a hot cup of coffee or a cold glass of milk. I love slicing it thick and spreading a little butter or cream cheese on top while it’s still slightly warm – the chocolate chips get all melty and it’s absolutely delicious. You can also toast a slice and top it with a smear of peanut butter or almond butter for extra protein, which makes it feel more like a complete breakfast. If you’re serving it as dessert, a scoop of vanilla ice cream on the side turns it into something really special.

Storage Instructions

Store: This bread stays moist for days thanks to the zucchini and banana. Wrap it tightly in plastic wrap or keep it in an airtight container at room temperature for up to 3 days, or in the fridge for up to a week. I actually think it tastes even better the next day once all the flavors have had time to meld together.

Freeze: Chocolate zucchini banana bread freezes really well, which makes it great for stashing away for later. Wrap individual slices in plastic wrap and then place them in a freezer bag, or freeze the whole loaf wrapped tightly in plastic and foil for up to 3 months.

Thaw: Let frozen slices sit at room temperature for about 30 minutes, or pop them in the microwave for 20-30 seconds if you’re in a hurry. For a whole loaf, just leave it on the counter for a few hours until it’s completely thawed.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 2600-2800
• Protein: 35-45 g
• Fat: 110-125 g
• Carbohydrates: 370-400 g

Ingredients

For the dry ingredients:

• 1/2 cup cocoa powder (Hershey’s Special Dark recommended)
• 1 1/2 cups all-purpose flour
• 1 tsp baking soda
• 1/2 tsp baking powder
• 1/2 tsp salt
• 1 tsp cinnamon
• 1/2 tsp espresso powder
• 1 cup semi-sweet chocolate chips

For the batter:

• 1/2 cup vegetable oil
• 1/2 cup granulated sugar
• 1/2 cup packed brown sugar
• 2 large eggs, room temperature
• 1 1/2 tsp vanilla extract
• 2 cups zucchini, finely shredded and squeezed dry
• 1 cup mashed bananas

Step 1: Prepare Pan and Combine Dry Ingredients

• 1/2 cup cocoa powder
• 1 1/2 cups all-purpose flour
• 1 tsp baking soda
• 1/2 tsp baking powder
• 1/2 tsp salt
• 1 tsp cinnamon
• 1/2 tsp espresso powder

Preheat your oven to 350°F and grease a 9×5 inch loaf pan or similar size, making sure to coat the bottom and sides evenly.

While the oven heats, whisk together the cocoa powder, all-purpose flour, baking soda, baking powder, salt, cinnamon, and espresso powder in a large bowl.

Whisking rather than just stirring helps aerate the dry ingredients and prevents lumps, which is especially important with cocoa powder.

Set this mixture aside—I find that having your dry ingredients ready before mixing the wet ones keeps the batter from becoming overmixed, which can make the bread dense.

Step 2: Combine Wet Ingredients and Prepare Add-ins

• 1/2 cup vegetable oil
• 1/2 cup granulated sugar
• 1/2 cup packed brown sugar
• 2 large eggs, room temperature
• 1 1/2 tsp vanilla extract
• 1 cup mashed bananas
• 2 cups zucchini, finely shredded and squeezed dry

In a second large bowl, whisk together the vegetable oil, granulated sugar, and packed brown sugar until well combined.

Add the room temperature eggs and vanilla extract, whisking until the mixture is smooth and slightly lighter in color.

Fold in the mashed bananas until just incorporated, then add the finely shredded and squeezed-dry zucchini, folding gently to distribute evenly throughout.

The zucchini should be as dry as possible—I squeeze it in a clean kitchen towel to remove excess moisture, which prevents a soggy bread and helps achieve better texture.

Step 3: Combine Dry and Wet Mixtures with Chocolate Chips

• dry ingredient mixture from Step 1
• wet ingredient mixture from Step 2
• 1 cup semi-sweet chocolate chips

Pour the wet ingredient mixture into the bowl with the dry ingredients.

Using a spatula or wooden spoon, gently fold the two mixtures together, stirring just until the dry ingredients are moistened and no flour streaks remain—this typically takes 10-15 gentle folds.

Don’t overmix, as this develops the gluten and can result in a tough, dense bread.

Fold in the semi-sweet chocolate chips, distributing them evenly throughout the batter.

Step 4: Bake Until Golden and Set

• batter from Step 3

Pour the batter into your prepared loaf pan, smoothing the top gently with a spatula.

Place the pan in the preheated 350°F oven and bake for 45-60 minutes.

The bread is done when a toothpick inserted into the center comes out with just a few moist crumbs (not wet batter).

Since every oven runs differently, start checking around the 45-minute mark.

The top should be deeply browned and may have a slight crack down the center.

Step 5: Cool and Serve

Remove the bread from the oven and let it cool in the pan for 10-15 minutes.

This allows the crumb structure to set properly and makes it easier to remove from the pan.

Turn the bread out onto a wire rack to cool completely before slicing.

I like to wait until it’s completely cool before slicing—this helps prevent the bread from crumbling, though warm slices with butter are absolutely delicious if you can’t resist sampling it earlier!