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!

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I am super into browning butter, just like any good food blogger is, I guess. And isn’t it a strange world we live in where food blogger is an actual job? Freaking crazy. Awesome, yes…but also crazy.
But you know what is actually NOT awesome….is buying a car when you are a food blogger. Filling out the “occupation” slot on the credit application is very confusing. To both me and the credit manager guy.
So like, do I put BLOGGER? That sounds so…I don’t know…not like a real job?
And then ALL THE QUESTIONS you get after you hand over the application…you make MONEY blogging? How does that work? Where does the money come from? How? HOWWW?
So yeah, I ended up putting “Website Publisher”, which I thought at the time sounded super grown up and profesh. Until the guy came out and asked me what that meant. And I had to say blogger anyway.
Anyway. Next time I will just write “Food Blogger” as my occupation with my URL next to it.
Let’s now talk blondies. With browned butter, because it’s my JOB.
Banana Blondies

These are Banana Blondies. And they are simple simple. Promise.
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
- 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 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 would like to make these in a jelly roll pan. Do you think a double batch would fit about right?
Yes I believe that would work great!
I’m terrible at baking and needed a recipe to use my last overripe banana and this was IT!
I added a pump of pumpkin spice syrup to the frosting and substituted the milk for vanilla protein & it turned out delicious!
Thank you!!
These were delicious! I was looking for something to make with my overripe bananas besides banana bread or banana cake. I had 2 bananas, so I threw them both in since I didn’t want to double the batch. It was so, so yummy! My new staple for overripe bananas! Thank you for sharing this recipe.
You do not say self rising flour or plain?
All purpose flour 🙂
Excellent
These were sooooo good.
I don’t have regular milk – can almond milk be substituted?
thank you!
That should work fine!
These are very tasty and easy. Good when you don’t want to make a big dessert. Nuts would be a good addition.