These 25 zucchini brownie variations provide delicious, chocolatey ways to bake with fresh summer zucchini—covering fudgy classic recipes, gluten-free, vegan, keto, air fryer, and healthy flourless options.

1. Easy 30-Minute Double Chocolate Zucchini Brownies

Ingredients: 1 cup finely grated zucchini (squeezed dry), 1/2 cup melted butter, 1 cup granulated sugar, 1 tsp vanilla extract, 1 cup all-purpose flour, 1/2 cup unsweetened cocoa powder, 1 tsp baking soda, 1/2 cup semi-sweet chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper.
2. In a large bowl, whisk melted butter, sugar, and vanilla extract until smooth.
3. Stir in all-purpose flour, unsweetened cocoa powder, and baking soda until a thick batter forms.
4. Fold in the finely grated zucchini and chocolate chips until evenly incorporated.
5. Spread batter into pan and bake for 25–30 minutes until a toothpick inserted into the center comes out with moist crumbs.

2. Ultra Fudgy Secret Veggie Zucchini Brownies

Ingredients: 1.5 cups shredded zucchini, 1/2 cup vegetable oil, 1.25 cups sugar, 1 tbsp vanilla extract, 2 cups flour, 1/2 cup cocoa powder, 1.5 tsp baking soda, 1 tsp salt, 1 cup dark chocolate chunks.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and grease a 9×13-inch pan.
2. Whisk vegetable oil, sugar, and vanilla extract in a mixing bowl.
3. Combine flour, cocoa powder, baking soda, and salt in a separate bowl.
4. Mix dry ingredients into wet ingredients (mixture will be very dry), then fold in shredded zucchini; let sit 5 minutes until moisture releases.
5. Fold in dark chocolate chunks, press batter into pan, and bake for 30 minutes until dense and fudgy.

3. Healthy Flourless Peanut Butter Zucchini Brownies

Ingredients: 1 cup finely grated zucchini (patted dry), 1 cup creamy natural peanut butter, 1/3 cup pure maple syrup, 1 large egg, 1/3 cup cocoa powder, 1 tsp baking soda, 1/2 cup dark chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch pan with parchment.
2. Whisk creamy peanut butter, maple syrup, and egg together in a bowl until smooth.
3. Stir in cocoa powder and baking soda until fully combined.
4. Fold in grated zucchini and dark chocolate chips.
5. Transfer batter into pan and bake for 22–25 minutes until edges are set.

4. Healthy Vegan Chocolate Zucchini Brownies

Ingredients: 1.5 cups finely shredded zucchini, 1/3 cup melted coconut oil, 1/2 cup maple syrup, 1 tsp vanilla, 1 cup oat flour, 1/2 cup cocoa powder, 1 tsp baking powder, 1/2 cup dairy-free chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
2. Whisk melted coconut oil, maple syrup, and vanilla extract in a bowl.
3. Add oat flour, cocoa powder, and baking powder, stirring until smooth.
4. Fold in shredded zucchini and dairy-free chocolate chips.
5. Pour into pan and bake for 28–32 minutes until firm on top.

5. 100% Gluten-Free Fudgy Zucchini Brownies

Ingredients: 1 cup grated zucchini, 1/2 cup melted butter, 1 cup sugar, 2 large eggs, 1 tsp vanilla, 3/4 cup 1-to-1 gluten-free baking flour, 1/2 cup cocoa powder, 1/2 tsp xanthan gum (if not in blend), 1/2 cup chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and grease an 8×8-inch dish.
2. Whisk melted butter and sugar, then beat in eggs and vanilla until glossy.
3. Whisk gluten-free flour and cocoa powder together, then stir into wet ingredients.
4. Fold in grated zucchini and chocolate chips.
5. Bake for 25–28 minutes until shiny and crinkly on top.

6. 15-Minute Air Fryer Zucchini Brownies

Ingredients: 1/2 cup grated zucchini, 3 tbsp melted butter, 1/4 cup sugar, 1 egg yolk, 1/3 cup flour, 2 tbsp cocoa powder, 1/4 tsp baking soda, 2 tbsp chocolate chips.

Step-by-Step Instructions:

1. Preheat air fryer to 330°F (165°C) and line a 6-inch air-fryer-safe pan with parchment paper.
2. Mix melted butter, sugar, and egg yolk in a bowl.
3. Stir in flour, cocoa powder, and baking soda until smooth.
4. Fold in grated zucchini and chocolate chips.
5. Air fry for 13–15 minutes until top is set; cool completely before slicing.

7. Low-Carb Keto Chocolate Zucchini Brownies

Ingredients: 1 cup finely grated zucchini (squeezed completely dry), 1 cup almond flour, 1/3 cup cocoa powder, 1/2 cup powdered erythritol or monk fruit, 1/2 cup melted butter, 2 eggs, 1/2 tsp baking powder, 1/3 cup sugar-free chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
2. Whisk eggs, melted butter, and monk fruit sweetener in a bowl.
3. Stir in almond flour, cocoa powder, and baking powder until smooth.
4. Fold in squeezed zucchini and sugar-free chocolate chips.
5. Bake for 22–25 minutes until set; cool in fridge for best fudgy texture.

8. High-Protein Chocolate Zucchini Brownies

Ingredients: 1 cup shredded zucchini, 2 scoops chocolate whey/casein protein powder, 1/2 cup chocolate Greek yogurt, 1/4 cup cocoa powder, 1/4 cup oat flour, 1 egg, 1/4 cup maple syrup, 1/2 tsp baking powder.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
2. Whisk egg, Greek yogurt, and maple syrup together.
3. Stir in protein powder, cocoa powder, oat flour, and baking powder.
4. Fold in shredded zucchini until completely mixed.
5. Bake for 20–22 minutes (do not overbake to keep moisture).

9. Single-Serve Microwave Zucchini Mug Brownie

Ingredients: 2 tbsp grated zucchini, 2 tbsp flour, 1 tbsp cocoa powder, 1 tbsp sugar, 1/2 tsp baking powder, 1 tbsp melted butter, 1.5 tbsp milk, 1 tbsp chocolate chips.

Step-by-Step Instructions:

1. Whisk flour, cocoa powder, sugar, and baking powder inside a microwave-safe mug.
2. Stir in melted butter and milk until smooth batter forms.
3. Mix in grated zucchini and top with chocolate chips.
4. Microwave on HIGH for 60–70 seconds.
5. Let cool for 2 minutes before enjoying warm.

10. Old-Fashioned Country Style Zucchini Brownies

Ingredients: 2 cups shredded zucchini, 1/2 cup oil, 1.5 cups sugar, 2 tsp vanilla, 2 cups flour, 1/2 cup cocoa, 1.5 tsp baking soda. Frosting: 3 tbsp melted butter, 3 tbsp cocoa powder, 1 cup powdered sugar, 2 tbsp milk.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and grease a 9×13-inch pan.
2. Mix oil, sugar, vanilla, flour, cocoa, baking soda, and shredded zucchini into a batter; spread into pan.
3. Bake for 30 minutes and cool completely.
4. Whisk frosting ingredients (butter, cocoa, powdered sugar, milk) until smooth.
5. Spread chocolate frosting over cooled brownies.

11. Healthy Oat Flour Chocolate Zucchini Brownies

Ingredients: 1 cup grated zucchini, 1.25 cups oat flour, 1/2 cup cocoa powder, 1/2 cup maple syrup, 1/3 cup melted coconut oil, 2 eggs, 1 tsp baking soda, 1/2 cup dark chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch dish.
2. Whisk eggs, maple syrup, and melted coconut oil.
3. Stir in oat flour, cocoa powder, and baking soda.
4. Fold in grated zucchini and dark chocolate chips.
5. Bake for 25–28 minutes until center is firm.

12. Cream Cheese Swirl Zucchini Brownies

Ingredients: 1 batch Double Chocolate Zucchini Brownie batter (Recipe #1). Swirl: 4 oz softened cream cheese, 2 tbsp sugar, 1 egg yolk, 1/2 tsp vanilla.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
2. Prepare brownie batter and spread into pan.
3. Beat cream cheese, sugar, egg yolk, and vanilla until smooth.
4. Dollop cream cheese mixture over brownie batter and swirl with a knife.
5. Bake for 30–33 minutes until cream cheese is set.

13. Salted Caramel Drizzle Zucchini Brownies

Ingredients: 1 batch Fudgy Zucchini Brownie batter (Recipe #2), 1/3 cup salted caramel sauce, 1/2 tsp coarse flaky sea salt.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and prepare brownie batter in an 8×8 pan.
2. Bake brownies for 25–28 minutes until done.
3. Remove from oven and let cool for 15 minutes.
4. Drizzle warm salted caramel sauce generously over top.
5. Sprinkle flaky sea salt over caramel before slicing.

14. 5-Ingredient Easy Zucchini Brownies

Ingredients: 1 cup shredded zucchini, 1 cup Nutella or chocolate hazelnut spread, 2 large eggs, 1/2 cup flour, 1/2 cup chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch pan.
2. Whisk Nutella and eggs together in a bowl until smooth.
3. Stir in flour until just combined.
4. Fold in shredded zucchini and chocolate chips.
5. Spread in pan and bake for 22–25 minutes.

15. No-Bake Raw Chocolate Zucchini Brownie Bites

Ingredients: 1/2 cup finely shredded zucchini (squeezed completely dry), 1 cup pitted Medjool dates, 1 cup walnuts, 1/3 cup cocoa powder, 1 tbsp chia seeds, 1 tsp vanilla.

Step-by-Step Instructions:

1. Process walnuts, dates, cocoa powder, and chia seeds in a food processor until a sticky dough forms.
2. Add squeezed zucchini and vanilla; pulse until incorporated.
3. Press mixture into an 8×8-inch pan lined with parchment or roll into 1-inch balls.
4. Chill in refrigerator for 1 hour to firm up.
5. Slice into bites and store refrigerated.

16. Fudgy Espresso Chocolate Zucchini Brownies

Ingredients: 1 cup grated zucchini, 1/2 cup butter, 1 cup sugar, 2 eggs, 1 tbsp instant espresso powder, 3/4 cup flour, 1/2 cup cocoa powder, 1/2 cup dark chocolate chunks.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8 pan.
2. Whisk melted butter, sugar, eggs, and espresso powder until smooth.
3. Stir in flour and cocoa powder.
4. Fold in grated zucchini and dark chocolate chunks.
5. Bake for 25 minutes until rich and fudgy.

17. Oil-Free Applesauce Zucchini Brownies

Ingredients: 1 cup shredded zucchini, 1/2 cup unsweetened applesauce, 3/4 cup brown sugar, 1 tsp vanilla, 1 cup flour, 1/2 cup cocoa powder, 1 tsp baking soda, 1/2 cup mini chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8 pan.
2. Whisk unsweetened applesauce, brown sugar, and vanilla together.
3. Stir in flour, cocoa powder, and baking soda.
4. Fold in shredded zucchini and mini chocolate chips.
5. Bake for 28–30 minutes until center is cooked.

18. Brown Butter Walnut Zucchini Brownies

Ingredients: 1 cup grated zucchini, 1/2 cup unsalted butter, 1 cup brown sugar, 2 eggs, 3/4 cup flour, 1/2 cup cocoa powder, 1/2 cup chopped toasted walnuts, 1/2 cup dark chocolate chips.

Step-by-Step Instructions:

1. Melt butter in a saucepan over medium heat, swirling until golden brown and nutty; let cool 10 minutes.
2. Preheat oven to 350°F (175°C) and line an 8×8 pan.
3. Whisk brown butter, brown sugar, and eggs until smooth.
4. Stir in flour and cocoa powder, then fold in zucchini, toasted walnuts, and chocolate chips.
5. Bake for 25–28 minutes.

19. Flourless Avocado Zucchini Fudge Brownies

Ingredients: 1 cup shredded zucchini, 1 ripe avocado (mashed smooth), 1/2 cup maple syrup, 2 eggs, 1/2 cup cocoa powder, 1/2 tsp baking soda, 1/2 cup chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8-inch dish.
2. Blend mashed avocado, eggs, and maple syrup until completely smooth.
3. Stir in cocoa powder and baking soda.
4. Fold in shredded zucchini and chocolate chips.
5. Bake for 25–28 minutes; chill before slicing for maximum fudge texture.

20. Sugar-Free Monk Fruit Zucchini Brownies

Ingredients: 1 cup shredded zucchini (squeezed dry), 1/2 cup melted butter, 3/4 cup granular monk fruit sweetener, 2 eggs, 3/4 cup flour (or almond flour), 1/2 cup Dutch cocoa, 1/2 tsp baking powder, 1/2 cup sugar-free chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and grease an 8×8 pan.
2. Whisk melted butter, monk fruit sweetener, and eggs.
3. Stir in flour, Dutch cocoa powder, and baking powder.
4. Fold in squeezed zucchini and sugar-free chocolate chips.
5. Bake for 22–25 minutes until set.

21. Small-Batch 8×8 Zucchini Brownies for Two

Ingredients: 1/2 cup grated zucchini, 1/4 cup melted butter, 1/2 cup sugar, 1 egg, 1/2 cup flour, 1/4 cup cocoa powder, 1/4 tsp baking soda, 1/4 cup chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line a small 8×8 or 6×6 pan.
2. Whisk melted butter, sugar, and egg in a small bowl.
3. Add flour, cocoa powder, and baking soda, stirring gently.
4. Fold in grated zucchini and chocolate chips.
5. Bake for 20 minutes until set.

22. Sheet Pan Crowd-Pleaser Zucchini Brownies

Ingredients: 3 cups shredded zucchini, 1 cup oil, 2.5 cups sugar, 2 tsp vanilla, 3 cups flour, 3/4 cup cocoa powder, 2 tsp baking soda, 1 tsp salt, 1.5 cups chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and grease a 13×18-inch half-sheet pan.
2. Whisk oil, sugar, and vanilla in a large bowl.
3. Add flour, cocoa powder, baking soda, and salt.
4. Fold in 3 cups shredded zucchini and chocolate chips.
5. Spread evenly across sheet pan and bake for 25–28 minutes.

23. Raspberry Swirl Dark Chocolate Zucchini Brownies

Ingredients: 1 batch Fudgy Zucchini Brownie batter (Recipe #2). Swirl: 1/2 cup fresh raspberries (mashed), 1 tbsp chia seeds, 1 tbsp maple syrup.

Step-by-Step Instructions:

1. Mix mashed raspberries, chia seeds, and maple syrup; let sit 10 minutes to thicken into quick jam.
2. Preheat oven to 350°F (175°C) and prepare brownie batter in an 8×8 pan.
3. Dollop raspberry mixture over brownie batter.
4. Swirl gently using a butter knife.
5. Bake for 28–30 minutes until set.

24. Mint Chocolate Chip Zucchini Brownies

Ingredients: 1 batch Double Chocolate Zucchini Brownie batter (Recipe #1, plus 1/2 tsp peppermint extract). Topping: 1 cup mint buttercream frosting, 1/4 cup dark chocolate chips.

Step-by-Step Instructions:

1. Add peppermint extract to brownie batter and bake according to Recipe #1; cool completely.
2. Prepare mint buttercream frosting (butter, powdered sugar, peppermint extract, green food coloring).
3. Spread mint frosting smoothly over cooled brownies.
4. Sprinkle extra chocolate chips over frosting before slicing.

25. Nut-Free School-Safe Zucchini Brownies

Ingredients: 1 cup finely grated zucchini, 1/2 cup melted butter (or sunflower oil), 1 cup sugar, 2 eggs, 1 tsp vanilla, 3/4 cup all-purpose flour, 1/2 cup cocoa powder, 1/2 tsp baking powder, 1/2 cup nut-free chocolate chips.

Step-by-Step Instructions:

1. Preheat oven to 350°F (175°C) and line an 8×8 pan with parchment paper.
2. Whisk melted butter, sugar, eggs, and vanilla in a bowl.
3. Stir in all-purpose flour, cocoa powder, and baking powder until combined.
4. Fold in finely grated zucchini and nut-free chocolate chips.
5. Bake for 25 minutes until set; pack into lunchboxes once cooled!