Fudgy Banana Brownies – These brownies are incredibly thick, fudgy, and loaded with banana flavour. Banana lovers will LOVE these!

Fudgy Banana Brownies
If you are a big fan of bananas (me, me!), then today’s recipe is just for you.
I have taken my favourite brownie recipe and stuffed them full of bananas, which makes for a SUPER fudgy and moist brownie.
You’re seriously gonna love them!
These Fudgy Banana Brownies are loaded with 4 large bananas. Two mashed bananas go into the batter, and two whole bananas, cut in half, are placed on top of the batter.
Mmmm.
Looking for more banana recipes? Check out my Chocolate Chip Banana Muffins.
Ingredients you’ll need
Here’s a list of ingredients you’ll need to make these brownies. You can find my recipe card at the bottom of this post for the complete list with their amounts.
- Unsalted butter
- Granulated sugar
- Cocoa powder
- Salt
- Large eggs
- Vanilla extract
- Large bananas: You’ll need 4.
- Plain/all-purpose flour
- Chocolate chips
How to make Fudgy Banana Brownies
To make these brownies, add the butter, sugar, cocoa powder, and salt to a microwave-safe bowl, and heat in 30 second intervals, stirring after each one, until the butter is melted and the mixture feels very warm to the touch.
Add the eggs, vanilla, and TWO mashed bananas, and mix until combined. Fold in the flour, then the chocolate chips.
Pour the batter into an 8×8-inch square baking pan lined with parchment or foil, and spread out evenly.
Slice the remaining bananas in half lengthwise, and place on top of the batter.
Bake for 45 – 50 minutes, or until the centre is no longer jiggly and a toothpick inserted comes out almost clean with a few moist crumbs.
Allow to cool completely before cutting into bars.
Because these brownies are incredibly moist and fudgy, I like to keep mine refrigerated and serve them chilled.
The printable recipe card with the full list of ingredients, their measurements, and instructions can be found at the bottom of this post.
NOTE: For best results, I highly recommend using the gram measurements (with a digital scale), rather than the cup measurements. Cup measurements are simply not accurate enough, and I cannot guarantee the best results if you use them.
These Fudgy Banana Brownies are:
- SUPER thick, fudgy and moist
- so quick and easy to throw together
- rich and chocolatey
- loaded with banana flavour
How long will these brownies last? These brownies will stay fresh, stored in an airtight container, at room temperature or in the fridge for up to 1 week.
Can I freeze these brownies? Yes, they also freeze well for up to 3 months. Thaw overnight in the fridge before serving.
Tried this recipe?
If you try this recipe, let us know! Leave a comment, rate it, and don’t forget to tag me on Instagram and hashtag it #simplybakeblog. I’d love to see!
Try these brownies next!
- Strawberry Mint Brownies
- Nutella Fudge Brownies
- Cheesecake Brownies
- Chocolate Chip Cookie Dough Brownies
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Fudgy Banana Brownies
Ingredients
- 1 ¼ sticks (140g) unsalted butter
- 1 ½ cups (300g) granulated sugar
- ¾ cup (75g) cocoa powder
- ¼ teaspoon salt
- 2 large eggs, cold
- 2 teaspoons vanilla extract
- 4 large bananas
- ½ cup (60g) plain/all-purpose flour
- ½ cup (90g) chocolate chips
Instructions
- Preheat the oven to 180C/350F/Gas 4. Line an 8×8-inch square baking pan with foil or parchment paper, and set aside.
- Place the butter, sugar, cocoa powder, and salt into a microwave-safe bowl, and microwave in 30 second intervals, stirring after each one, until the butter is melted and the mixture feels very warm to the touch.
- Mix in the eggs, one at a time, then the vanilla and TWO mashed bananas. Fold in the flour until fully combined. Fold in the chocolate chips.
- Pour the batter into the prepared pan and spread out evenly. Slice the remaining bananas in half lengthwise, and place on top of the batter.
- Bake for 45 – 50 minutes, or until the centre is no longer jiggly and a toothpick inserted comes out almost clean with a few moist crumbs. You may cover the pan loosely with foil past the 30 – 40 minute mark to prevent excessive browning.
- Allow to cool completely in the pan on a wire rack before cutting into bars. I refrigerated my brownies before slicing for extra neat, clean cuts.
Video
Recipe Notes
Nutrition Information:
Nutrition information is automatically calculated, so should only be used as an approximation.
I’ve made these several times now and they’re STUPID good. Listen, you need to try them with vanilla ice cream and a tablespoon of bourbon poured over the whole thing. It’s an amazing combination, I’ve served it at a fancy dinner party and everyone LOVED it
These are very delicious but very sweet! When I make them again (and I will, because yum!) I will make them with half the sugar and perhaps ground oats instead of flower for increased healthiness. I subbed the chocolate chips for walnuts here btw. Thanks for the recipe!
These are SO GOOD. And quick to come together. We couldn’t wait for it to completely cool though 🙂
I made this but with some small tweaks based on the comments below. I also split the recipe in half to make a chocolate and white chocolate version (omitted the cocoa in this one), added a little more flour, halved the sugar and used brown sugar. I layered the mixes – white chocolate brownie, banana slices then I poured over the chocolate layer and baked for 40 minutes. The bottom white choc layer wasn’t quite cooked but I think my banana layer was partly to blame, still tastes good and banana/white choc tastes just like bananas in syrup.
Thankyou. And could l use oil instead of butter? Out of butter.
Can I replace the chocolate chips with compound chocolate pieces? They are softer than chocolate chips so they will probably not retain their form during baking.
They will be okay to use in this recipe 🙂
Hey! i tried this recipe and it turns out really good! now i want more banana in it, should i then reduce on something to have the same fudginess?
thank you!
Hi Shasa – I’m so glad you enjoyed the recipe! I cannot say without recipe testing myself, but if you was to add another banana, you may need more flour to combat the very runny mixture.
You can replace the eggs with two extra bananas and use a dairy free spread to make these vegan and they’re still just as fudgy and wonderful!
Hi Marsha,
Do you use Dutch processed cocoa powder or natural cocoa powder?
Thanks
Melvin
I always use Dr. Oetker Fine Dark Cocoa Powder for brownies, which, I believe is Dutch processed. I also like using Hershey’s Natural Unsweetened Cocoa.
This is absolutely my new favourite brownie recipe! I substituted half of the sugar with brown sugar, used dark choc chips and baked for about 55 mins. It came out soooooo fudgy and moist. Tasted even better after a night in the fridge.
Thanks for sharing!
These were a VERY pleasant surprise! I am not a banana fan, but found myself with a whole bunch of brown bananas on my counter. I can turn those into delicious fudgy brownies? Yes, yes I can. Thank you! BTW I used brown sugar and cut it to 1 cup, and used gluten free flour.
I was wondering if you have tried these with almond flour! looking to make them gluten free for my friends birthday, but I haven’t had much experience with it.
I have not, sorry.
Alexis, I made them with King Arthur gluten-free flour, and they are perfect.
Hi Marsha,
If I want to make mine a little less fudgy, but still chewy, should I add more flour or an extra egg? If you recommend additional flour, by how much? Also, will the brownies freeze/defrost well even with the banana on the top?
Thanks!
I recommend adding 1/4 cup (30g) to 1/2 cup more flour for less fudgy brownies. Yes, these freeze and defrost well with the sliced bananas on top. Enjoy!
Hi Marsha, I don’t have a microwave but these look amazing, is there a way to do it without the microwave part at the beginning? Could I do it on a hob?
Hi Adam! Yes, you can do it on the hob too. Add the ingredients to a heat-proof bowl over a pan of simmering water, and heat until everything is melted and combined, and hot to the touch.
hiii! im wondering, can i use ripe bananas?
Yes 🙂
I made these last night and they’re soo moist! Thank you! I used about half the sugar too and they were still delicious.
I’m so glad you enjoyed them, Gina! 🙂
I made these Saturday afternoon for dessert. OMG their so good you’d smack your mama, well not really. But they are amazing, you should make these! Banana and chocolate is such a great combination. The presentation is super as well. Thanks for the great recipe!
Hi Jennifer – I’m so glad you enjoyed the recipe! 🙂
Woah Marsha! Those are some mega fudgy brownies. . .just the way I like them btw. And the addition of the banana is genius. I just love how that yellow pops up against all that fudginess.
Thanks, Lynn! 🙂