I make this zucchini muffins recipe so often in late summer that my kids have started asking for it by name instead of just calling it “the green muffins.” Which, fair, since you honestly can’t see much green once they’re baked that’s kind of the magic of it.

I still remember the first batch that actually worked. I’d tried a zucchini muffin recipe years ago that came out dense and a little sad, more like a brick with chocolate chips than an actual muffin. I almost gave up on the whole idea. Then one afternoon I had a lonely zucchini sitting on my counter, about a cup and a half of grated flesh, and I decided to rework the batter from scratch less flour, a touch more oil, a good glug of vanilla. I pulled that first tray out of the oven, and the tops had that perfect golden dome, the kitchen smelled like cinnamon and melted chocolate, and I knew I’d landed on something I’d keep making.

That’s really the whole point of this zucchini muffins recipe it’s not fussy, it doesn’t ask you to squeeze out zucchini juice for ten minutes or hunt down a weird ingredient, and it still comes out moist, tender, and rises beautifully every single time.

I’ll walk you through exactly how I make them, step by step, with the little things I’ve picked up from baking this a few dozen times.

Recipe Card Details

Ingredients

1 ½ cups all-purpose flour (190 g) (or gluten-free 1:1 flour blend)
½ tsp baking powder (2 g)
½ tsp baking soda (3 g)
½ tsp fine sea salt (3 g)
1 tsp ground cinnamon (2 g)
½ cup extra light olive oil (120 ml) (or canola oil or vegetable oil)
1 large egg, room temperature (about 50 g)
¾ cup granulated sugar (150 g)
2 Tbsp milk (30 ml), whole milk or 2%
1 ½ tsp pure vanilla extract (7 ml)
1 ½ cups grated zucchini (180 g), from 1 medium zucchini or about ½ lb (225 g)
½ cup semi-sweet chocolate chips (90 g), divided

Step-by-Step Instructions

Preheat your oven to 350°F (175°C). Grease a 12-count muffin pan, or line it with cupcake liners.
In a medium mixing bowl, whisk together the flour, baking powder, baking soda, salt, and cinnamon. This just makes sure the leaveners get evenly distributed through the batter.
In a separate bowl, thoroughly whisk together the egg, oil, sugar, milk, and vanilla until smooth. I always whisk this a little longer than feels necessary, because it helps the sugar start to dissolve and gives the muffins a softer crumb.
Add the flour mixture into the wet ingredients. Whisk until just blended and smooth — no dry streaks of flour left.
Grate the zucchini on the large holes of a box grater. Fold it into the batter until it’s well incorporated, then fold in ⅓ cup of the chocolate chips, if using.
I don’t squeeze the liquid out of my zucchini before folding it in, and honestly, that little bit of extra moisture is exactly what keeps these muffins so soft.
Using a trigger-release ice cream scoop, divide the batter evenly between the 12 lined muffin cups. Sprinkle the tops with the remaining chocolate chips.
Bake at 350°F for 22–25 minutes, or until a toothpick inserted in the center comes out clean.
Let the muffins cool in the tin for 5 minutes, then transfer them to a wire rack to cool the rest of the way. I know it’s tempting, but give them those 5 minutes in the pan — pulling them out too early is how you end up with a muffin that falls apart in your hand.

Tips & Variations

Don’t over-mix the batter. Once the flour goes in, I stir just until it disappears. Over-mixing develops the gluten too much and makes the muffins chewy instead of tender.
No need to squeeze the zucchini. Some recipes have you wring it out in a towel. I’ve tested it both ways, and skipping that step is actually what gives these their soft, moist texture.
Storage: These keep well at room temperature in an airtight container for about 3 days, or in the fridge for up to a week. What works for me is layering a paper towel underneath them in the container — it soaks up extra moisture so the tops don’t get soggy.
Freezing: I freeze these all the time. Once fully cooled, wrap each muffin individually in plastic wrap, then store them in a freezer bag for up to 3 months.
Reheating: A few seconds in the microwave (about 10–15 seconds) brings them right back to fresh-from-the-oven softness. If they’re frozen, let them thaw at room temperature first, then warm briefly.
Swap ideas: Walnuts or pecans instead of chocolate chips, a handful of raisins, or even a swirl of cream cheese in the center all work nicely if you want to change things up.

FAQ

Do I need to peel the zucchini first?

No, I never peel it. The skin is thin, softens completely during baking, and you won’t notice it in the finished muffin it also adds a little extra color flecked through the crumb.

Why did my muffins turn out dense or gummy?

This usually comes down to over-mixing the batter or measuring the flour incorrectly. I always spoon my flour into the measuring cup and level it off rather than scooping straight from the bag, since scooping packs in extra flour.

Can I make this zucchini muffins recipe gluten-free?

Yes, I’ve made these with a 1:1 gluten-free flour blend and they turn out just as moist. Just make sure your blend already contains xanthan gum, or the texture can come out a bit crumbly.

Do I need to drain the grated zucchini before adding it?

No, I don’t drain mine. The extra moisture from the zucchini is part of what makes these muffins so soft instead of dry.

Can I turn this into a loaf instead of muffins?

Yes, I’ve done this before. Pour the batter into a greased 9×5-inch loaf pan and bake at 350°F for around 50–60 minutes, checking with a toothpick starting at the 45-minute mark.

The Science Behind This Recipe

There’s more going on in this batter than it looks like at first glance. The baking powder and baking soda are both leaveners, but they work a little differently baking soda needs an acidic ingredient to activate (here, that’s partly the natural acidity in the zucchini and brown notes from the sugar), while baking powder already contains its own acid and reacts on its own once it hits liquid and heat. Together they give the muffins that tall, domed rise.

Zucchini is around 95% water, so as the muffins bake, that water slowly turns to steam inside the crumb. This steam is what keeps the texture soft and moist instead of dry, almost like the zucchini is quietly doing the same job that extra butter or oil would do in a drier muffin recipe.

The golden-brown muffin tops come from the Maillard reaction a chemical reaction between sugars and proteins that happens once the surface hits a high enough temperature. It’s the same reaction responsible for browning in toast or seared meat, and it’s what gives these muffins that slightly nutty, caramelized top instead of a pale one.