Moist Chocolate Zucchini Muffins Recipe

Quick Recipe Version (TL;DR)

• Yield: 12 standard muffins
• Prep Time: 15 minutes
• Cook Time: 20 minutes
• Total Time: 35 minutes

Quick Ingredients

• 1 1/2 cups finely shredded zucchini, lightly packed, not squeezed dry unless very watery
• 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 fine salt
• 1/2 teaspoon instant espresso powder, optional
• 2 large eggs, room temperature
• 1/2 cup packed light brown sugar
• 1/3 cup granulated sugar
• 1/2 cup neutral oil, such as canola, vegetable, or avocado oil
• 1/3 cup plain Greek yogurt or sour cream
• 1/4 cup whole milk
• 2 teaspoons vanilla extract
• 3/4 cup semisweet chocolate chips, divided

Do This

• 1. Preheat oven to 375°F and line a 12-cup muffin pan with paper liners.
• 2. Finely shred zucchini and lightly blot only if it is dripping wet.
• 3. Whisk flour, cocoa, baking soda, baking powder, salt, and espresso powder in one bowl.
• 4. Whisk eggs, brown sugar, granulated sugar, oil, yogurt, milk, and vanilla in another bowl.
• 5. Fold dry ingredients into wet ingredients, then fold in zucchini and 1/2 cup chocolate chips.
• 6. Divide batter among muffin cups, top with remaining 1/4 cup chocolate chips, and bake for 20 minutes.
• 7. Cool in the pan for 5 minutes, then transfer to a rack and enjoy warm or at room temperature.

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Why You’ll Love This Recipe

• Deep chocolate flavor: Cocoa powder, chocolate chips, and a little espresso powder make these taste like tender chocolate cake.
• Moist without being heavy: Shredded zucchini melts into the crumb, adding softness without making the muffins taste like vegetables.
• Everyday-friendly: They are rich enough for dessert but simple enough for breakfast, lunchboxes, or afternoon snacks.
• Easy to make: No mixer is needed, and the batter comes together in two bowls with basic pantry ingredients.

Grocery List

• Produce: 1 medium zucchini, enough for 1 1/2 cups finely shredded zucchini
• Dairy: 2 large eggs, plain Greek yogurt or sour cream, whole milk
• Pantry: All-purpose flour, unsweetened cocoa powder, baking soda, baking powder, fine salt, instant espresso powder, light brown sugar, granulated sugar, neutral oil, vanilla extract, semisweet chocolate chips, paper muffin liners

Full Ingredients

For the Chocolate Zucchini Muffins

• 1 1/2 cups finely shredded zucchini, lightly packed, about 180g or 1 medium zucchini
• 1 1/2 cups all-purpose flour, spooned and leveled, 180g
• 1/2 cup unsweetened cocoa powder, 45g
• 1 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon fine salt
• 1/2 teaspoon instant espresso powder, optional but recommended
• 2 large eggs, room temperature
• 1/2 cup packed light brown sugar, 110g
• 1/3 cup granulated sugar, 67g
• 1/2 cup neutral oil, such as canola, vegetable, or avocado oil
• 1/3 cup plain Greek yogurt or sour cream, room temperature
• 1/4 cup whole milk, room temperature
• 2 teaspoons vanilla extract
• 3/4 cup semisweet chocolate chips, divided

Optional Finishing Touches

• 1 tablespoon mini chocolate chips for extra bakery-style tops, optional
• 1 teaspoon coarse sugar for a lightly crisp top, optional
• 1 pinch flaky sea salt for sprinkling after baking, optional

Step-by-Step Instructions

Step 1: Preheat the oven and prepare the pan

Preheat the oven to 375°F. Line a standard 12-cup muffin pan with paper liners, or grease the cups lightly with nonstick spray. This recipe makes 12 standard muffins, so each cup should be filled generously but not overflowing.

Step 2: Shred the zucchini

Trim the ends from the zucchini, then finely shred it on the small or medium holes of a box grater. Measure 1 1/2 cups shredded zucchini, lightly packed. Do not peel the zucchini; the tender green flecks disappear into the chocolate batter and the peel adds moisture and structure.

If the zucchini is freshly shredded and very wet, gently blot it with a clean kitchen towel or paper towel. Do not wring it completely dry. The goal is to remove puddles of excess liquid while keeping enough moisture to create a soft, tender muffin crumb.

Step 3: Mix the dry ingredients

In a medium bowl, whisk together the 1 1/2 cups all-purpose flour, 1/2 cup cocoa powder, 1 teaspoon baking soda, 1/2 teaspoon baking powder, 1/2 teaspoon fine salt, and 1/2 teaspoon instant espresso powder, if using. Whisk for at least 20 seconds to break up cocoa clumps and evenly distribute the leavening.

Step 4: Mix the wet ingredients

In a large bowl, whisk the 2 eggs, 1/2 cup packed light brown sugar, and 1/3 cup granulated sugar until smooth and glossy, about 30 seconds. Add the 1/2 cup oil, 1/3 cup Greek yogurt or sour cream, 1/4 cup whole milk, and 2 teaspoons vanilla extract. Whisk until the mixture looks fully combined and slightly thickened.

Step 5: Combine the batter

Add the dry ingredients to the wet ingredients. Use a flexible spatula to fold the batter together just until you no longer see large streaks of flour. The batter will be thick, chocolatey, and slightly glossy.

Fold in the shredded zucchini and 1/2 cup of the semisweet chocolate chips. Stop mixing as soon as the zucchini and chips are evenly distributed. Overmixing can make muffins dense, so a few tiny dry specks are better than a heavily stirred batter.

Step 6: Fill the muffin cups

Divide the batter evenly among the 12 prepared muffin cups, using about 1/4 cup batter per muffin. The cups should be about 3/4 full. Sprinkle the remaining 1/4 cup chocolate chips over the tops. If using mini chocolate chips, coarse sugar, or a tiny pinch of flaky sea salt, add them now.

Step 7: Bake the muffins

Bake at 375°F for 20 minutes, or until the muffin tops are set and a toothpick inserted into the center comes out with a few moist crumbs. If the toothpick hits a melted chocolate chip, test another spot. The tops should spring back lightly when touched.

Step 8: Cool and serve

Let the muffins cool in the pan for 5 minutes, then transfer them to a wire rack. They are delicious warm, when the chocolate chips are melty, but the flavor becomes even deeper after they cool completely.

Pro Tips

• Use finely shredded zucchini: Smaller shreds disappear into the muffin crumb and make the texture softer and more cake-like.
• Do not squeeze the zucchini dry: Zucchini is the moisture source here. Only blot it if it is watery enough to drip.
• Measure cocoa carefully: Too much cocoa can dry out muffins. Spoon it into the measuring cup and level it, or use 45g for best accuracy.
• Use room-temperature dairy: Room-temperature eggs, yogurt, and milk blend more smoothly into the batter and help the muffins rise evenly.
• Let them cool before judging the texture: The crumb finishes setting as the muffins cool, becoming plush, tender, and deeply chocolatey.

Variations

• Double chocolate walnut muffins: Fold in 1/2 cup chopped toasted walnuts along with the zucchini and chocolate chips for crunch.
• Chocolate orange zucchini muffins: Add 1 teaspoon finely grated orange zest to the wet ingredients for a bright bakery-style flavor.
• Whole wheat version: Replace 1/2 cup of the all-purpose flour with 1/2 cup white whole wheat flour. The muffins will taste slightly nuttier but still stay moist.

Storage & Make-Ahead

Store cooled muffins in an airtight container at room temperature for 2 days, or refrigerate for up to 5 days. For the softest texture, place a paper towel under and over the muffins in the container to absorb excess moisture. To freeze, wrap each cooled muffin tightly and freeze in a freezer-safe bag for up to 3 months. Thaw at room temperature for 1 hour, or microwave one muffin for 20 seconds until soft and lightly warm. You can shred the zucchini up to 24 hours ahead; refrigerate it in a covered container and gently blot before using if liquid collects at the bottom.

Nutrition (per serving)

Calories: 267 kcal | Carbs: 34g | Protein: 5g | Fat: 14g | Saturated Fat: 4g | Fiber: 3g | Sugar: 20g | Sodium: 210mg | Cholesterol: 34mg