These Banana Blondies with brown sugar frosting are out of this world delicious. They’re perfectly flavored with banana and literally melt in your mouth!
Looking for more Banana Recipes? Try my Chocolate Chip Banana Bread or my Banana Bread Crumb Cake!

Banana Blondies Woth Brown Sugar Frosting
These are a great alternative to banana bread, and perfectly easy to make! They’re great to serve at parties, or for a sweet lunchbox treat!

How to Make These Amazing Banana Bars
Grab you a banana and some brown sugar.

Then melt your butter. Or brown it if you’re nasty.
Mix the butter and brown sugar together.

Mix in the rest of your ingredients…including the banana, that you need to mash, btw.

And then spread it in to a lined pan…

Bake it up for about 25 minutes. And if you want (you want) make some brown sugar frosting. It’s so yum. and when they’re cooled spread it all up on there…

I swear you need to make these. They are THAT good.

If you like banana stuff, check out these other recipes I’ve got:
- Banana Bread Crumb Cake
- Brown Sugar Banana Bread
- Banana Bread Cookies
- Peanut Butter Cup Banana Bread
Banana Blondies
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Yield: 12 blondies 1x
- Category: Dessert
- Method: Oven
- Cuisine: American
Description
These Banana Blondies with brown sugar frosting are out of this world delicious. They’re perfectly flavored with banana and literally melt in your mouth!
Ingredients
Blondies
- 1/2 cup butter, melted and if desired browned
- 1 cup light brown sugar, packed
- 1 egg
- 1 1/2 teaspoon vanilla
- 1/4 teaspoon kosher salt
- 1 cup all purpose flour
- 1/2 cup mashed banana (1 medium banana)
Brown Sugar Frosting
- 1/4 cup butter
- 1/2 cup light brown sugar
- 2 tablespoon milk
- 1 cup powdered sugar
Instructions
Blondies
- Preheat oven to 350°F. Line an 8×8 baking dish with parchment paper and coat with nonstick spray. Set aside
- In a large saucepan melt the butter (and if desired continue cooking the butter until it’s amber in color, stirring frequently *see note). Allow the butter to cool for 5 minutes and stir in the brown sugar, vanilla, and salt to combine. Stir in the egg until smooth and finally the flour and mashed banana. Spread in prepared pan.
- Bake for 30 minutes, or until the center is set.
- Transfer pan to wire rack to cool.
- Frost the blondies when they are mostly cooled.
Brown Sugar Frosting
- In a medium saucepan melt butter. Add brown sugar and milk and stir until mixture comes to just a boil. Remove from heat, allow to cool for 5 minutes.
- Stir in powdered sugar with a whisk.
- Spread on top of blondies and allow frosting to set and blondies to cool completely before cutting into squares.
Notes
If you choose to brown the butter, melt butter in saucepan and continue cooking, once it’s melted by swirling the butter in the pan until butter reaches a deep golden brown color.
Nutrition
- Serving Size:
- Calories: 151
- Sugar: 20.1 g
- Sodium: 128.2 mg
- Fat: 4.8 g
- Carbohydrates: 26.3 g
- Protein: 1.8 g
- Cholesterol: 11.9 mg












I made these today and they taste great however my batch came out kind of flat. Is there a trick to getting them to rise or would it be ok to add some baking powder to the recipe?
Shelly, I just found your blog because one of my son’s teachers baked these for a school bake sale. I bought one, ate it and immediately began tearing through social media to track the baker/recipe. These. Are. So. Good. I cannot wait to make them myself!
So glad you found me!! Yep, these are pretty great 🙂
Next time you buy a car, bring a batch of these for the salesperson! Bring some cookies/goodies every time you take the car in for service. Talk about making friends!
I think I just won these at a silent auction fundraiser…holy smokes are these good!! I looked up the recipe–these are it. Crack. Thank you! Can hardly wait to make these. Divine.
I was a bit skeptical about making these because they are so simple, but I have SO MANY frozen bananas sitting in my freezer that I decided to give it a shot. Wow am I glad I did! These things are amazing! I doubled the recipe because I needed to get rid of more bananas and was bringing them to a potluck. I also used 3 bananas instead of 2 and added vanilla to the frosting. The bake time ended up being about 45 minutes and they were just perfect. Thanks so much for the recipe!!
About to make these but do I have to use tinfoil. I’m currently out wahhh
You don’t have to… but just grease you pan well!
Just made these yesterday and I’m tucking the recipe away for future use! These yummy little squares taste like a dense banana snack cake with a delish caramely frosting. Use the foil lined pan and refrigerate before cutting and they cut really neatly and easily.
Can I make these a day in advance and keep them in the refrigerator or will that mess up the texture? Thanks Ü
Just made these.. Looks promising 🙂
Just made these and they are delicious! I will be making them again 🙂