July 2021. Someone left six massive zucchinis on my porch. I already had eight in my garden. Oliver won't eat zucchini bread, zucchini noodles made him gag, and I was running out of ideas fast. Then I remembered my college roommate's mom used to make these zucchini brownies that nobody could tell had vegetables in them. Made a batch that afternoon. Oliver ate three before dinner. Didn't spot the tiny green bits until the second batch. Didn't care once I told him. Just wanted to know when I'd make more. It's August now and I've made these maybe 20 times. My freezer's packed with shredded zucchini for winter because Oliver asks for them even when there's snow outside.
What to Serve With Zucchini Brownies
These fudgy zucchini brownies are rich enough that I don't mess with them much. Oliver wants cold milk, period. His dad dumps vanilla ice cream on top while they're warm. I'm over here eating mine with coffee at 9pm when everyone's in bed. For people coming over, vanilla ice cream or whipped cream is safe. Sometimes I'll dust powdered sugar on them for school stuff so they look less homemade. Fresh berries help if the chocolate's too much. Mint ice cream is weirdly good with these.
These go with our Best Root Veggie Gratin Recipe - vegetables in both, nobody notices. Our Easy Butterscotch Heaven Pie adds variety. Our Easy Chicken Cordon Bleu Bites Recipe covers the savory side for parties. But honestly? These healthy zucchini brownies are fine by themselves. They're better the next day once everything settles. That's if they make it to the next day, which almost never happens here.
Jump to:
- What to Serve With Zucchini Brownies
- Ingredients For Zucchini Brownies
- How To Make Zucchini Brownies Step By Step
- Tasty Twists on Zucchini Brownies
- Zucchini Brownies Substitutions
- Equipment For Zucchini Brownies
- Storage Tips
- Top Tip
- Sister's Secret Fix Passed Down for Generations
- FAQ
- Your Garden Zucchini Problem, Solved!
- Related
- Pairing
- Zucchini Brownies
Ingredients For Zucchini Brownies
The Chocolate Base:
- Unsweetened cocoa powder
- Granulated sugar
- Brown sugar
- Vanilla extract
- Salt
The Wet Stuff:
- Eggs
- Vegetable oil or melted butter
- Shredded zucchini
The Dry Mix:
- All-purpose flour
- Baking soda
- Baking powder
Optional Add-Ins:
- Chocolate chips
- Walnuts or pecans
- Espresso powder
See recipe card for quantities.
How To Make Zucchini Brownies Step By Step
I've made these enough times that I could do it half-asleep. Here's what works:
Prep Your Zucchini First:
- Shred zucchini using box grater or food processor
- Dump it in a clean kitchen towel
- Squeeze over the sink until no more water comes out
- Seriously, squeeze it again - you'd be surprised
- Set aside while you do everything else
Mix the Wet Ingredients:
- Preheat oven to 350°F and grease your 9x13 pan
- Whisk eggs in a large bowl until they're light
- Add oil or melted butter and mix well
- Stir in both sugars and vanilla
- Mix until it looks smooth
Add the Dry Stuff:
- Whisk together flour, cocoa powder, baking soda, baking powder, and salt in another bowl
- Dump dry ingredients into wet ingredients
- Stir until just combined - don't overmix or they get tough
- Fold in your squeezed-dry zucchini
Bake These Fudgy Zucchini Brownies:
- Spread batter in prepared pan - it'll be thick
- Sprinkle chocolate chips on top if you want
- Bake 25-30 minutes until toothpick comes out with a few moist crumbs
- Don't overbake - slightly underdone is better than dry
- Let cool at least 10 minutes before cutting (good luck with that)
Tasty Twists on Zucchini Brownies
Over the past two summers, these variations became regular requests:
Double Chocolate Version:
Started making this when Oliver decided regular brownies weren't chocolatey enough. Add 1 cup chocolate chips to the batter, sprinkle more on top before baking. They're basically chocolate overload. His friend's mom asked if I put espresso in them (I didn't, but that's actually a good idea).
Peanut Butter Swirl:
My brother suggested this at a cookout. Melt ½ cup peanut butter, drop spoonfuls on the batter, swirl with a knife. Bake as usual. Tastes like those peanut butter cup candies but in brownie form. Oliver picks these over regular ones now.
Mint Chocolate:
This happened because I had leftover peppermint extract from Christmas cookies. Add ½ teaspoon peppermint extract to the batter, use dark chocolate chips. Tastes like those thin mints but fudgier. Make these in December and people think you're fancy.
Cream Cheese Swirl:
Beat 4 oz cream cheese with ¼ cup sugar and an egg. Drop spoonfuls on brownie batter, swirl. The tangy cream cheese cuts through the chocolate. This is the one I make when adults are coming over because it looks impressive.
Box Mix Shortcut:
For those days when I can't even. Use a box of brownie mix, add 1 ½ cups squeezed zucchini, reduce oil by half. Not as good as homemade but way faster. These zucchini brownies with box mix saved me during Oliver's birthday party when I forgot about dessert until that morning.
Zucchini Brownies Substitutions
Oil Alternatives:
- Vegetable oil → Melted coconut oil (adds slight coconut taste)
- Regular oil → Melted butter (richer flavor)
- Oil → Applesauce (cuts calories, makes them cakier)
- Standard → Greek yogurt (protein boost, different texture)
Sugar Options:
- White sugar → Coconut sugar (darker color, caramel-ish)
- Regular → Honey or maple syrup (reduce other liquids by 2 tablespoons)
- Both sugars → Just brown sugar (chewier texture)
- Standard → Sugar substitute (haven't tried this, can't vouch for it)
Flour Swaps:
- All-purpose → Whole wheat (denser, nuttier)
- Regular → Gluten-free blend (for celiac folks, works fine)
- White flour → Almond flour (low-carb, changes texture a lot)
- Standard → Oat flour (grind oats in blender)
Egg Replacements:
- Regular eggs → Flax eggs (1 tablespoon ground flax + 3 tablespoons water per egg)
- Standard → Chia eggs (same ratio as flax)
- Eggs → Applesauce (¼ cup per egg, makes them denser)
Mix-In Ideas:
- Chocolate chips → White chocolate chips
- Regular → Peanut butter chips
- Chips → Chopped walnuts or pecans
- Standard → Dried cherries (weird but good)
Equipment For Zucchini Brownies
- 9x13 metal or glass baking pan
- Box grater or food processor with shredding blade
- Clean kitchen towel for squeezing zucchini
- Two mixing bowls
- Whisk or wooden spoon
Storage Tips
I've learned a few things about keeping these around (though they rarely last long):
Counter Storage (2-3 days): Let them cool completely first or they'll get soggy. Cover the pan with foil or plastic wrap. Room temperature is fine. They actually get fudgier sitting out overnight. Oliver sneaks down for midnight brownies, I find the foil crumpled on the counter every morning.
Fridge Storage (Up to a week): Wrap individual squares in plastic wrap or stack them in an airtight container with parchment between layers. The cold makes them firmer and less messy to eat. Some people like them cold, Oliver hates them cold. I microwave his for 10 seconds to make peace. They get this melty texture that's pretty good actually.
Freezer Storage (3 months): Wrap individual brownies in plastic wrap, then stick them all in a freezer bag. Pull one out whenever you need it. They thaw in about an hour on the counter or 30 seconds in the microwave. I did this last summer with extra zucchini - made triple batches, froze most of them. Had fresh brownies all winter without touching a zucchini.
Top Tip
- I've figured out a few things about keeping these around, though they usually don't last long enough to matter. For counter storage (2-3 days tops), let them cool all the way or they'll get sweaty and weird under the cover. Just slap some foil or plastic wrap over the pan. Room temperature's fine. They get fudgier after sitting overnight, which Oliver found out during his midnight snack runs. I find crumpled foil on the counter every morning now.
- Fridge storage works for about a week if you wrap each square in plastic or stack them in a container with parchment paper between layers. The cold makes them firmer and way less messy to eat with your hands. Some people eat them straight from the fridge. Oliver acts like I'm torturing him. I microwave his for 10 seconds and he's suddenly happy again. Gets all melty and warm inside.
- Freezer's good for 3 months. Wrap each brownie in plastic, throw them in a freezer bag. Pull one out when Oliver wants brownies at 7am on a random Tuesday. They thaw in an hour on the counter or 30 seconds in the microwave. Last summer I went nuts and made triple batches, froze most. We had brownies all winter without me seeing another zucchini till spring. Worked perfectly.
Sister's Secret Fix Passed Down for Generations
My older sister figured something out about zucchini brownies back in 2015 that changed everything. She was making these for her daughter's bake sale and kept hearing they were too dry. Every recipe just said shred the zucchini and throw it in. got annoyed and started messing around with it.
Her trick? After you squeeze out the water from the zucchini, save it. Yeah, that green liquid you normally pour down the sink. Let it sit for a minute, then pour off the clear water sitting on top. What's left at the bottom is this thick green stuff. Add one tablespoon of it back to your batter. Sounds crazy, works perfectly. The Zucchini Brownies stay moist for days without getting soggy or weird. Still can't taste the zucchini, but the chocolate tastes deeper somehow.
I thought she was lying when she first told me. Made them her way just to prove her wrong. Oliver ate four and asked why mine tasted better than normal. Been doing it sister's way ever since. She learned it from our mom's friend who made zucchini bread in the 80s. That lady won every church bake-off for like ten years running. Now you know her secret.
FAQ
Can I add zucchini to brownie mix?
Yeah, works fine. Grab a box of brownie mix, add 1 ½ cups squeezed-dry shredded zucchini, cut the oil in half. The zucchini adds moisture so you don't need as much oil. These zucchini brownies with box mix aren't as good as scratch but they're faster. I did this when I forgot about the school bake sale till 9pm.
Why do people put zucchini in brownies?
Two reasons: adds moisture without tasting like vegetables, and it uses up all that garden zucchini taking over your kitchen. The zucchini makes these fudgy zucchini brownies stay soft for days. Plus you can tell yourself they're healthier because vegetables. Are they actually? Nah, but it helps.
Do zucchini brownies taste good?
They taste like brownies, just fudgier. Can't taste the zucchini at all - just chocolate. Oliver's eaten these maybe 50 times and still doesn't believe there's vegetables in them even though he watches me make them. His friends have no clue either. They just think I make good brownies.
Do zucchini brownies need an egg?
Regular recipes use eggs but you can skip them. Use flax eggs (1 tablespoon ground flax plus 3 tablespoons water per egg) or applesauce (¼ cup per egg). Texture's different - denser, less fluffy. I made vegan zucchini brownies for Oliver's friend once and they were okay, just not as fudgy.
Your Garden Zucchini Problem, Solved!
Now you've got everything you need to turn all that Zucchini Brownies into something people actually want. From squeezing the water out to pulling them early for extra fudge. These brownies completely saved my summer. I went from zucchini rotting on my counter to Oliver begging me to make more brownies. He's eating vegetables and has no clue. His dad doesn't know either, and I'm keeping it that way because the second I tell him, he'll suddenly "taste" it.
Want more ways to sneak good stuff past picky kids? Our Healthy Street Corn Chicken Rice Bowl has corn and peppers everywhere but tastes like something from a restaurant. Oliver asks for it on his birthday. Need party food that vanishes? Our Easy Chicken Cordon Bleu Bites Recipe is gone before halftime - seen it happen at three Super Bowl parties now. And when you want dessert but brownies feel like work, our Easy Butterscotch Heaven Pie takes 15 minutes. Nobody believes me about the time. They think I'm making it up.
Share your wins! We love hearing about kids who found out what's in them and kept eating anyway. Or better, the ones who still don't know.
⭐⭐⭐⭐⭐ Rate this Zucchini Brownies and tell us if anyone figured out the secret!
Related
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Pairing
These are my favorite dishes to serve with Zucchini Brownies
Zucchini Brownies
Equipment
- 1 9x13 baking pan (Metal or glass)
- 1 Box grater or food processor (For shredding zucchini)
- 1 Clean kitchen towel (For squeezing moisture out of zucchini)
- 2 Mixing bowls (One for wet, one for dry)
- 1 Whisk or wooden spoon (For mixing batter)
Ingredients
The Chocolate Base:
- ½ cup Unsweetened cocoa powder
- 1 cup Granulated sugar
- ½ cup Brown sugar - Packed
- 2 teaspoon Vanilla extract
- ½ teaspoon Salt
The Wet Stuff:
- 2 large Eggs - Room temperature
- ½ cup Vegetable oil - Or melted butter
- 2 cups Shredded zucchini - Squeezed dry
The Dry Mix:
- 1 ½ cups All-purpose flour
- 1 teaspoon Baking soda
- ½ teaspoon Baking powder
Optional Add-Ins:
- 1 cup Chocolate chips - Semi-sweet or dark
- ½ cup Walnuts or pecans - Chopped
- 1 teaspoon Espresso powder - Enhances chocolate flavor
Instructions
- Shred zucchini with a grater or food processor, then squeeze out excess moisture using a clean towel until mostly dry.
- Heat oven to 350°F (175°C) and grease a 9x13-inch baking pan with butter or nonstick spray.
- Whisk eggs, oil or melted butter, sugars, and vanilla in a large bowl until smooth. In another bowl, whisk flour, cocoa, baking soda, baking powder, and salt, then combine just until blended.
- Gently fold the squeezed zucchini into the batter until evenly distributed. Add optional mix-ins like chocolate chips or nuts.
- Spread batter in the prepared pan and bake 25-30 minutes, until a toothpick inserted comes out with a few moist crumbs.
- Let brownies cool at least 10 minutes before slicing. Serve warm or at room temperature.
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