If you have an abundance of summer garden zucchini or simply want to bake extra-moist chocolate treats, zucchini brownies are the ultimate kitchen secret. The grated zucchini adds natural moisture without leaving any veggie flavor behind—resulting in dense, fudgy, and incredibly rich squares every single time.
Here are 15 incredible zucchini brownie recipes complete with step-by-step instructions so you can start baking right away!
Baking Essentials Tip: For all recipes using fresh zucchini, shred it finely using a box grater. Unless specified to squeeze out water, simply fold the grated zucchini directly into the batter—its natural juices are what keep these brownies so moist!
👨🍳 15 Detailed Step-by-Step Zucchini Brownie Recipes
1. The Ultimate Classic Fudgy Zucchini Brownies
The baseline master recipe: rich, dark, and perfectly fudgy.
- Prep time: 15 mins | Bake time: 28 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: 1 1/2 cups finely grated zucchini (do not drain), 1/2 cup vegetable oil, 1 cup granulated sugar, 1 tsp vanilla extract, 1 cup all-purpose flour, 1/2 cup unsweetened cocoa powder, 1 1/2 tsp baking soda, 1/2 tsp salt, 1/2 cup semi-sweet chocolate chips.
- Instructions:
- Preheat oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper.
- In a large bowl, whisk together the vegetable oil, sugar, and vanilla extract.
- Stir in the grated zucchini until well combined.
- Whisk in the flour, cocoa powder, baking soda, and salt just until a thick batter forms. Fold in the chocolate chips.
- Spread the batter evenly into the prepared pan (it will be thick). Bake for 28–32 minutes until a toothpick inserted near the center comes out with a few moist crumbs. Cool completely before slicing.
2. Easy 30-Minute Double Chocolate Chunk Zucchini Brownies
Double the cocoa, double the chocolate chunks for intense chocolate flavor.
- Prep time: 10 mins | Bake time: 22 mins | Pan: 9×9-inch | Yield: 16 squares
- Ingredients: 2 cups finely grated zucchini, 1/2 cup melted unsalted butter, 3/4 cup brown sugar, 1 large egg, 1 tsp vanilla, 1 cup flour, 1/2 cup dark cocoa powder, 1/2 tsp baking powder, 3/4 cup dark chocolate chunks.
- Instructions:
- Preheat oven to 350°F (175°C) and grease a 9×9-inch pan.
- In a bowl, mix melted butter, brown sugar, egg, and vanilla until smooth.
- Stir in the shredded zucchini.
- Sift in the flour, dark cocoa powder, and baking powder. Fold gently, then stir in 1/2 cup of chocolate chunks.
- Pour into the pan, sprinkle remaining 1/4 cup chocolate chunks over the top, and bake for 22–25 minutes.
3. Flourless & Gluten-Free Almond Butter Zucchini Brownies
Naturally grain-free and made in one bowl.
- Prep time: 10 mins | Bake time: 25 mins | Pan: 8×8-inch | Yield: 12 squares
- Ingredients: 1 cup squeezed grated zucchini (blotted dry), 1 cup creamy almond butter, 1/3 cup pure maple syrup, 1/3 cup cocoa powder, 1 egg, 1 tsp baking soda, 1/2 cup chocolate chips.
- Instructions:
- Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
- In a food processor or large bowl, blend almond butter, maple syrup, egg, and cocoa powder until smooth.
- Stir in the baking soda and gently fold in the dry zucchini and chocolate chips.
- Transfer to pan and bake for 25–28 minutes until set on top.
4. Kid-Approved “Sneaky Veggie” Milk Chocolate Brownies
Felt-like classic bakery brownies with peeled zucchini so no green specs show!
- Prep time: 15 mins | Bake time: 30 mins | Pan: 9×13-inch | Yield: 24 squares
- Ingredients: 2 cups peeled and finely shredded zucchini, 1/2 cup melted butter, 1 1/2 cups sugar, 2 eggs, 2 cups flour, 1/2 cup cocoa powder, 1 tsp baking soda, 1 cup milk chocolate chips.
- Instructions:
- Peel green skin off zucchini before shredding.
- Preheat oven to 350°F (175°C) and grease a 9×13-inch pan.
- Mix butter, sugar, and eggs until pale. Add zucchini.
- Add flour, cocoa, and baking soda. Fold in milk chocolate chips.
- Bake for 30 minutes until edges pull away from the pan.
5. Fudgy Vegan Zucchini Brownies (Egg & Dairy Free)
Plant-based perfection using flaxseed and coconut oil.
- Prep time: 12 mins | Bake time: 30 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: 1 1/2 cups shredded zucchini, 1/3 cup melted coconut oil, 3/4 cup coconut sugar, 1 tbsp ground flaxseed mixed with 3 tbsp water (flax egg), 1 cup flour, 1/2 cup cocoa, 1 tsp baking soda, 1/2 cup dairy-free chocolate chips.
- Instructions:
- Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
- Mix flaxseed and water; set aside for 5 minutes to thicken.
- Stir coconut oil, coconut sugar, and flax egg together. Mix in zucchini.
- Fold in flour, cocoa, and baking soda, then fold in chocolate chips.
- Bake for 30 minutes until set.
6. One-Bowl Easy Zucchini Cake Brownies
Minimal dish cleanup with a soft, cake-like texture.
- Prep time: 8 mins | Bake time: 25 mins | Pan: 9×9-inch | Yield: 16 squares
- Ingredients: 1 cup shredded zucchini, 1/3 cup melted butter, 1 cup sugar, 1 egg, 1 cup flour, 1/3 cup cocoa powder, 1 tsp baking powder, 1/4 tsp salt.
- Instructions:
- Preheat oven to 350°F (175°C) and grease a 9×9-inch pan.
- In a single large bowl, combine melted butter and sugar. Beat in egg, then add zucchini.
- Dump flour, cocoa, baking powder, and salt directly into the same bowl; stir gently until combined.
- Bake for 25 minutes.
7. Keto & Low-Carb Zucchini Brownies (Sugar-Free)
Almond flour base sweetened with erythritol.
- Prep time: 15 mins | Bake time: 25 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: 1 cup squeezed shredded zucchini, 1 1/2 cups almond flour, 1/2 cup unsweetened cocoa powder, 3/4 cup powdered erythritol/monk fruit, 1/3 cup melted butter, 2 eggs, 1 tsp baking powder, 1/2 cup sugar-free chocolate chips.
- Instructions:
- Preheat oven to 350°F (175°C) and parchment-line an 8×8-inch pan.
- Whisk almond flour, cocoa powder, sweetener, and baking powder.
- Stir in melted butter, eggs, squeezed zucchini, and sugar-free chips.
- Spread into pan and bake for 25 minutes.
8. Swirled Peanut Butter Zucchini Brownies
Creamy peanut butter marble top for sweet-salty balance.
- Prep time: 15 mins | Bake time: 30 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: Classic brownie base (Recipe #1), 1/3 cup creamy peanut butter, 2 tbsp maple syrup, 1 tbsp melted butter.
- Instructions:
- Prepare Recipe #1 batter and pour into prepared pan.
- In a small bowl, stir peanut butter, maple syrup, and 1 tbsp melted butter until smooth.
- Dollop peanut butter mixture over brownie batter and use a butter knife to swirl gently.
- Bake at 350°F (175°C) for 30 minutes.
9. Dark Chocolate & Sea Salt Chunk Zucchini Brownies
Decadent dark cocoa topped with flaky sea salt.
- Prep time: 10 mins | Bake time: 26 mins | Pan: 8×8-inch | Yield: 12 squares
- Ingredients: 1 1/2 cups shredded zucchini, 1/2 cup olive oil, 3/4 cup brown sugar, 1 egg, 1 cup flour, 1/2 cup dark Dutch-process cocoa, 3/4 cup 70% dark chocolate chunks, 1/2 tsp flaky sea salt (for topping).
- Instructions:
- Preheat oven to 350°F (175°C). Line an 8×8 pan.
- Whisk oil, sugar, and egg. Add zucchini.
- Stir in flour and Dutch cocoa. Fold in dark chocolate chunks.
- Pour into pan, sprinkle sea salt across the top, and bake for 26 minutes.
10. Chocolate Avocado Zucchini Fudge Brownies
Healthy fats replacement for butter yielding extra dense fudginess.
- Prep time: 15 mins | Bake time: 28 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: 1 cup shredded zucchini, 1 ripe avocado (mashed smooth), 1/2 cup maple syrup, 2 eggs, 1/2 cup cocoa powder, 1/2 cup oat flour, 1/2 tsp baking soda, 1/2 cup chocolate chips.
- Instructions:
- Preheat oven to 350°F (175°C) and line an 8×8 pan.
- Mash avocado until silky; whisk with eggs and maple syrup.
- Fold in zucchini, cocoa powder, oat flour, and baking soda.
- Stir in chocolate chips, transfer to pan, and bake for 28–30 minutes.
11. Paleo & Grain-Free Coconut Flour Zucchini Brownies
Dense, grain-free recipe rich in healthy fats.
- Prep time: 12 mins | Bake time: 30 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: 1 cup squeezed shredded zucchini, 1/2 cup coconut flour, 1/2 cup raw cocoa, 1/2 cup melted coconut oil, 1/2 cup honey, 3 eggs, 1 tsp vanilla.
- Instructions:
- Preheat oven to 350°F (175°C) and line pan with parchment.
- Whisk eggs, melted coconut oil, honey, and vanilla.
- Sift coconut flour and cocoa powder into wet mixture (coconut flour absorbs moisture quickly).
- Fold in squeezed zucchini, spread evenly, and bake for 30 minutes.
12. Espresso Dark Chocolate Zucchini Brownies
Espresso powder enhances the chocolate notes.
- Prep time: 10 mins | Bake time: 25 mins | Pan: 9×9-inch | Yield: 16 squares
- Ingredients: 1 1/2 cups shredded zucchini, 1/2 cup melted butter, 1 cup sugar, 1 egg, 1 tbsp instant espresso powder dissolved in 1 tbsp warm water, 1 cup flour, 1/2 cup cocoa powder, 1/2 cup dark chips.
- Instructions:
- Preheat oven to 350°F (175°C) and grease pan.
- Whisk butter, sugar, egg, and dissolved espresso liquid.
- Stir in zucchini, then fold in flour and cocoa powder.
- Fold in dark chips, spread into pan, and bake for 25 minutes.
13. High-Protein Greek Yogurt Zucchini Brownies
Boosted protein content for post-workout snacking.
- Prep time: 10 mins | Bake time: 25 mins | Pan: 8×8-inch | Yield: 12 squares
- Ingredients: 1 cup shredded zucchini, 1/2 cup plain Greek yogurt, 2 scoops chocolate whey protein powder, 1/2 cup oat flour, 1/3 cup cocoa powder, 1/3 cup honey, 1 egg, 1 tsp baking powder.
- Instructions:
- Preheat oven to 350°F (175°C) and line an 8×8 pan.
- Whisk Greek yogurt, honey, and egg. Add zucchini.
- Stir in protein powder, oat flour, cocoa powder, and baking powder.
- Pour into pan and bake for 22–25 minutes (do not overbake protein brownies).
14. Healthy Banana Zucchini Brownies (Oil-Free)
Naturally sweetened with ripe banana and maple syrup.
- Prep time: 10 mins | Bake time: 28 mins | Pan: 8×8-inch | Yield: 16 squares
- Ingredients: 1 cup shredded zucchini, 1 medium ripe banana (mashed), 1/3 cup maple syrup, 1 egg, 1 cup flour, 1/2 cup cocoa powder, 1 tsp baking soda, 1/3 cup mini chocolate chips.
- Instructions:
- Preheat oven to 350°F (175°C) and line pan.
- Mash banana; whisk with maple syrup and egg.
- Stir in zucchini. Fold in flour, cocoa, and baking soda.
- Fold in mini chips, spread into pan, and bake for 28 minutes.
15. Salted Caramel Swirl Zucchini Brownies
An indulgent twist featuring homemade or store-bought caramel.
- Prep time: 15 mins | Bake time: 30 mins | Pan: 9×9-inch | Yield: 16 squares
- Ingredients: Classic brownie base (Recipe #1), 1/3 cup thick salted caramel sauce, 1/2 tsp sea salt flakes.
- Instructions:
- Preheat oven to 350°F (175°C) and line pan.
- Prepare Recipe #1 batter and pour into the pan.
- Warm caramel sauce slightly so it is pourable, then drizzle over batter.
- Swirl gently using a toothpick or knife tip.
- Bake for 30 minutes. Sprinkle extra flaky sea salt on top as soon as it comes out of the oven.
💡 Pro-Tips for Perfect Zucchini Brownies
- Shredding Size: Use the fine side of your box grater so the zucchini melts seamlessly into the batter.
- Storage: Because of the natural moisture from the zucchini, store baked brownies in an airtight container in the refrigerator for up to 5 days.
- Freezing: You can freeze sliced brownies individually wrapped in foil for up to 3 months. Thaw at room temperature for 20 minutes before serving!