Chocolate Zucchini Muffin Recipe
What's inside
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This chocolate zucchini muffin recipe makes 12 tender, deeply chocolatey muffins with 1½ cups of grated zucchini, cocoa powder, and a simple moisture-control step that prevents a soggy center.
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Contents
Chocolate Zucchini Muffin Recipe at a Glance
| Detail | Specification |
|---|---|
| Yield | 12 standard muffins |
| Prep time | 20 minutes |
| Bake time | 18–22 minutes |
| Oven temperature | 375°F (190°C), reduced to 350°F (175°C) if using a dark metal pan |
| Zucchini amount | 1½ cups grated, about 180–200 g before moisture control |
| Pan capacity | 12 wells, approximately ⅓ cup or 80 ml each |
| Storage | Room temperature for 2 days, refrigerated for up to 5 days, frozen for up to 3 months |
Ingredients
- 1½ cups (180–200 g) grated zucchini
- 1¾ cups (219 g) all-purpose flour
- ½ cup (43 g) unsweetened natural cocoa powder
- 1 teaspoon baking soda
- ½ teaspoon baking powder
- ½ teaspoon fine salt
- ¾ cup (150 g) granulated sugar
- ½ cup (100 g) packed light brown sugar
- 2 large eggs, about 100 g without shells
- ½ cup (120 ml) neutral oil, such as canola or vegetable oil
- 2 teaspoons vanilla extract
- ½ cup (85 g) semisweet chocolate chips or chopped chocolate
- Optional: ¼ cup (30 g) chopped walnuts or pecans
How to Control Zucchini Moisture
Zucchini varies considerably in water content, so the weight of the grated vegetable is more useful than its volume alone. For this recipe, aim to start with 180–200 g of grated zucchini, then remove only the excess liquid.
- Use the large holes of a box grater. Do not puree the zucchini, since finely processed squash releases water too quickly.
- Place the grated zucchini in a clean kitchen towel or several layers of paper towel.
- Squeeze firmly once over a bowl or sink until the zucchini feels damp rather than dripping. Do not wring it completely dry.
- If the zucchini is unusually watery, let it sit for 5 minutes after grating, then squeeze it again lightly.
- Do not add the collected liquid back to the batter. It can make the centers gummy and lengthen the baking time.
A practical target is about 150–170 g of lightly squeezed zucchini in the mixing bowl. The remaining moisture will steam the muffins from within and keep them tender without flooding the batter.
Method
1. Prepare the pan and oven
Heat the oven to 375°F (190°C). Grease a standard 12-cup muffin pan or line it with paper liners. If using a dark metal pan, lower the oven to 350°F (175°C), because dark surfaces brown the edges more quickly.
2. Combine the dry ingredients
In a medium bowl, whisk together the flour, cocoa powder, baking soda, baking powder, and salt. Break up any cocoa lumps now; overmixing later can toughen the muffins.
3. Mix the wet ingredients
In a large bowl, whisk the granulated sugar, brown sugar, eggs, oil, and vanilla until smooth. Stir in the lightly squeezed zucchini. The mixture may look thick and slightly uneven, which is normal.
4. Make the batter
Add the dry ingredients to the wet mixture. Fold with a spatula just until no broad streaks of flour remain. Fold in the chocolate chips and nuts, if using. Stop mixing as soon as the batter comes together; a few small lumps are preferable to a dense crumb.
5. Portion and bake
Divide the batter among the 12 muffin wells, filling each about three-quarters full. This is approximately 70–75 g of batter per standard muffin. Bake for 18–22 minutes, rotating the pan once after 10 minutes if your oven has uneven heat.
Check the muffins with a wooden pick in the center of one muffin. It should come out with a few moist crumbs or a small smear of melted chocolate, but not wet batter. If the pick is clean and dry, the muffins may already be overbaked.
6. Cool correctly
Leave the muffins in the pan for 5 minutes, then transfer them to a wire rack. Do not seal them while warm. Trapped steam condenses inside the container and can make the tops sticky and the bottoms soggy. Cool completely before storing.
Why This Formula Produces Tender Muffins
Oil stays liquid at room temperature, giving these muffins a softer texture than a butter-only recipe. Brown sugar adds moisture and a mild caramel flavor, while cocoa powder supplies chocolate flavor without requiring melted chocolate in the batter. The zucchini contributes water gradually during baking, but the light squeezing step keeps that moistur
