Can I add zucchini to a boxed brownie mix?

Yes! Just stir in 1 cup of finely grated, drained zucchini into the mix before baking. It enhances moisture and adds richness.

Do zucchini brownies need to be refrigerated?

If you’re storing them longer than 2 days, yes. Keep them in the fridge to preserve texture and taste.

Add swirls (like peanut butter), toppings (like crushed nuts), or mix-ins (like white chocolate chips) for fun variations.

Try muffins, chocolate cake, cookies, or zucchini bread. It pairs great with chocolate, cinnamon, and vanilla.

Moist and fudgy zucchini brownies topped with a rich chocolate frosting – the perfect way to sneak in some veggies!

Scale

Preheat oven to 175°C (350°F) and grease a 9×13 inch baking dish.
In a large bowl, whisk together flour, cocoa powder, baking soda, and salt.
Stir in vegetable oil, sugar, and vanilla extract until combined.
Fold in shredded zucchini. Add water 1 tablespoon at a time until batter reaches a thick but spreadable consistency.
If using, stir in chopped walnuts.
Spread batter evenly into the prepared dish and bake for 25–30 minutes or until a toothpick comes out with moist crumbs.
While the brownies bake, make the frosting by whisking cocoa powder and melted butter in a bowl.
Add powdered sugar, milk, vanilla extract, and a pinch of salt. Whisk until smooth and creamy.
Once brownies are slightly cooled, spread frosting over the top.
Allow to set before slicing and serving.

Add the water gradually — the moisture from the zucchini may be enough depending on size and freshness.

Keywords: zucchini brownies, chocolate, dessert, hidden veggies