One-Bowl Chocolate Chip Zucchini Muffins
These chocolate chip zucchini muffins are so moist and tender you’d never guess they’re packed with shredded zucchini. One bowl, no mixer, and they come together in about 35 minutes.
The chocolate chips melt into little pockets of richness, and the crumb stays soft for days. They’re ideal for using up summer squash, but I bake them any time I want a quick treat.
Why These Muffins Stay So Moist
Zucchini is the secret, and it’s not just a gimmick. The shreds release just enough moisture as they bake, keeping the muffins tender without turning them gummy. You won’t taste the vegetable at all.
Oil instead of butter also helps lock in moisture, so they stay fresh on the counter longer than most muffins. The little bit of brown sugar adds a soft chewiness that plain white sugar can’t match.
Ingredients
- 1 ½ cups all-purpose flour: spooned and leveled, do not pack
- ½ teaspoon baking soda
- ½ teaspoon baking powder
- ¼ teaspoon salt
- ½ teaspoon ground cinnamon: optional
- ½ cup vegetable oil: or melted coconut oil
- ½ cup granulated sugar
- ½ cup packed light brown sugar
- 2 large eggs: room temperature
- 1 teaspoon vanilla extract
- 1 ½ cups finely shredded zucchini: about 1 medium, no need to peel, lightly packed
- ¾ cup semi-sweet chocolate chips: plus more for topping
Variations / Substitutions
- Swap half the flour: use whole wheat pastry flour for a slightly nuttier, more wholesome muffin.
- Melted butter: replace the oil with melted unsalted butter for a richer flavor, though the muffins will be slightly less moist the next day.
- Skip the chocolate: add ½ cup chopped walnuts or pecans for a nutty twist, or toss in both chips and nuts if you’re feeling generous.
- Add warmth: a pinch of nutmeg or a teaspoon of orange zest brightens the whole batch.
- Vegan option: swap the eggs for flax eggs (2 tablespoons ground flaxseed whisked with 5 tablespoons water, set for 5 minutes), use dairy-free chocolate chips, and stick with oil.
If you’re more of a loaf person, our classic zucchini bread is just as easy.
How to Make One-Bowl Chocolate Chip Zucchini Muffins
Step 1: Mix the Wet Ingredients and Zucchini
Preheat your oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners. In a large bowl, whisk the ½ cup oil, ½ cup granulated sugar, ½ cup brown sugar, 2 eggs, and 1 teaspoon vanilla until smooth and slightly pale. Stir in the full 1 ½ cups shredded zucchini.
The mixture will look loose and dotted with green shreds. That’s exactly right—the zucchini releases more moisture as it bakes, so do not squeeze it dry.
Step 2: Stir in the Dry Ingredients and Chocolate Chips
Sprinkle the 1 ½ cups flour, ½ teaspoon baking soda, ½ teaspoon baking powder, ¼ teaspoon salt, and the cinnamon (if using) over the wet mixture. Stir with a rubber spatula just until no streaks of flour remain, then fold in the ¾ cup chocolate chips.
The batter will be thick and a little lumpy. Overmixing makes muffins tough, so stop as soon as the flour disappears. A few small lumps are fine.
Step 3: Fill the Muffin Cups
Divide the batter evenly among the 12 liners, filling each about ¾ full. An ice cream scoop makes this fast and mess-free. If you like, press a few extra chocolate chips onto the top of each muffin for that bakery look.
The cups will look quite full, but these muffins don’t rise dramatically, so you don’t need to worry about overflow. Smoothing the tops with the back of a spoon gives them a more rounded shape.
Step 4: Bake Until Golden
Slide the pan into the preheated oven and bake for 18 to 22 minutes, until the tops are puffed and golden and a toothpick inserted in the center of a muffin comes out with just a few moist crumbs—no wet batter.
The kitchen will smell like a bakery, and the tops will show a few fine cracks. Rotate the pan halfway through if your oven tends to run unevenly, for even browning.
Step 5: Cool and Serve
Let the muffins cool in the pan for 5 minutes, then transfer them to a wire rack. They’re at their best slightly warm, when the chocolate chips are still gooey.
The crumb will be moist and tender, with those melted pockets of chocolate in every bite. Serve as is, or split one and spread with salted butter while it’s still warm.
Tips for the Best Zucchini Muffins
- If your zucchini shreds are very coarse, blot them gently with paper towels to remove just the surface moisture; don’t wring them dry.
- Mini chocolate chips distribute more evenly, so you get chocolate in nearly every bite.
- For bakery-style domed tops, fill the liners almost to the brim and bake at a steady 375°F the whole time.
- Before you start, check that your baking soda still fizzes when you add a splash of vinegar. Stale leavening means flat, dense muffins.
Bake times can drift a few minutes depending on your pan—here’s a rough guide.
| Pan type | Time | Doneness check |
|---|---|---|
| Dark or nonstick muffin tin | 16–20 minutes | Toothpick comes out with a few moist crumbs |
| Light aluminum muffin tin | 18–22 minutes | Toothpick comes out with a few moist crumbs |
Keeping Muffins Fresh
- Refrigerate: store in an airtight container for up to 4 days; the cold can set the chocolate, so a quick reheat helps.
- Reheating: a 15- to 20-second zap in the microwave remelts the chocolate chips and restores that just-baked feel.
- Freeze: wrap muffins individually in plastic, then tuck them into a zip-top bag and freeze for up to 3 months. Thaw on the counter or warm directly from frozen.
What to Serve With Chocolate Chip Zucchini Muffins
They’re perfect with a cold glass of milk or a hot cup of coffee; the slight bitterness of coffee plays beautifully against the sweet chocolate. For a quick breakfast, split one open and spread with salted butter while it’s still warm. A handful of fresh berries on the side cuts the richness nicely.
Frequently Asked Questions
Can I use frozen shredded zucchini?
Yes. Thaw it completely and drain off the excess liquid—do not squeeze. Pat dry with paper towels and use the same amount as fresh.
How do I make mini muffins?
Spoon the batter into a greased or lined 24-cup mini muffin pan. Bake at 350°F (175°C) for 10 to 13 minutes, until a toothpick inserted in the center comes out clean.
Should I pack the zucchini when measuring?
No. Lightly spoon the shredded zucchini into the measuring cup and level it. Packing adds too much moisture and can weigh the muffins down.
Chocolate Chip Zucchini Muffins Recipe
Ingredients
Method
- Preheat oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners. In a large bowl, whisk together the oil, granulated sugar, brown sugar, eggs, and vanilla until smooth. Stir in the zucchini.
- Sprinkle the flour, baking soda, baking powder, salt, and cinnamon over the wet mixture. Stir just until combined, then fold in the chocolate chips.
- Divide the batter evenly among the liners, filling each about ¾ full. Press a few extra chocolate chips on top if you like.
- Bake for 18 to 22 minutes, until the tops are golden and a toothpick inserted in the center comes out with a few moist crumbs.
- Cool in the pan for 5 minutes, then transfer to a wire rack. Serve warm or at room temperature.
