The Best One Banana Bread Chocolate Brownie Recipe

The Best One Banana Bread Chocolate Brownie Recipe

Got a lonely, overripe banana sitting on your kitchen counter? Don’t toss it! Instead, transform it into these delicious banana bread chocolate brownies. 

Stacked banana bread brownies on a table.

Banana bread or brownies?

Ah, the eternal dessert dilemma! Let’s weigh the delicious pros and cons.

Banana bread boasts a gentle sweetness with hints of warm spices like cinnamon and nutmeg. 

It’s like a cozy hug for your taste buds.

Banana bread is moist, tender and slightly crumbly. 

It’s the kind of loaf you want to curl up with on a rainy day.

Banana bread blurs the line. It’s acceptable for breakfast, snack time, or dessert. Oh my!

Talk about versatility!

But brownies, they are the dark knights of the dessert world. 

Rich, fudgy and packed with cocoa goodness. They’re the answer to any chocolate emergency.

The gooey center versus the crispy edges.

Macadamia nuts, pumpkin swirls or a sprinkle of sea salt? 

Brownies encourage your creativity. 

Each batch can be a delightful surprise with a five star rating.

Warm brownies fresh from the oven evoke memories of childhood and simpler times.

The winner: It’s a tie! Both have their unique charm. 

If you crave chocolate intensity, go for brownies. 

If you seek cozy nostalgia, slice into some banana bread. 

Or better yet, have both! 

This recipe is definitely next level and I promise it will be a hit. 

These moist and cake like bars are the perfect marriage of your favorite banana bread and decadent brownies. 

It may be tempting to toss that lonely ripe banana with all the brown spots, but don’t do that. 

A lone banana on a table


Here are the basic ingredients for the recipe.

Eggs. Three is the magic number. 

Sugar. You will need white sugar for the brownie batter as well as brown sugar for the banana bread recipe. 

Butter. You will need one and a half sticks of melted butter.

Flour. All purpose flour is what you’ll need.

Cocoa powder. Be sure to grab the unsweetened version from the baking aisle of your local grocery store. 

Baking powder. Not to be confused with baking soda. 

Vanilla extract. Be sure you purchase pure vanilla extract, which is made from real vanilla beans.

Banana. Grab that lone banana from the fruit bowl. This recipe calls for one mashed banana.

How to make small batch banana bread brownies

Chocolate batter and banana bread batter on a table top.

Mix the wet ingredients: 

For the brownies: Using a hand mixer or mixing by hand, cream the sugar, eggs, vanilla and melted butter in a medium bowl.

For the banana bread: In a separate bowl, mix together the brown sugar, egg and butter. Add in the mashed banana.

Three photos showing the layering of batter to make banana bread chocolate brownies.

Combine wet and dry ingredients:

For the brownies: Whisk together the flour, baking powder and cocoa powder in a small bowl. Add the flour mixture to the brownie mixture and gently mix until just combined. 

For the banana bread: Whisk together the flour and baking powder and add to the banana mixture, gently mixing until combined. 

A pan of brownies in the oven.


Pour the brownie batter into a 9 x 9 inch baking pan lined with parchment paper. Bake in a hot oven at 350 degrees F for 30 minutes baking time. A toothpick inserted into the center should come out clean.


Allow the brownies to cool completely before slicing into squares or bars. 


  • For the best banana flavor and sweetness, choose bananas for that are overripe, displaying brown spots on the peel. The riper the bananas, the sweeter your bread will be, as the starches turn to sugar.
  • Use a measuring cup when leveling flour. Weighing ingredients ensures accurate proportions.
  • Use a muffin tin if you don’t have a 9 x 9 inch pan. Simply layer the batters into a greased muffin pan. 
  • These brownies are versatile. Feel free to add 1/2 cup of chocolate chips, pecans or walnuts to the batters. 
  • Use parchment paper in the pan to make cleanup and handling easy. 
  • Wait until the brownies have cooled completely to room temperature before cutting for clean squares. 

Frequently Asked Questions

Can I freeze overripe bananas for later use?

Freezing overripe bananas is a smart way to prevent waste and have them ready for future recipes. 

Simply peel them first and either mash them before freezing or slice them into thick slices perfect for smoothies, pancake batter or just as a frozen snack.

How do I ensure my banana bread turns our perfectly every time?

Use very ripe bananas for best flavor and don’t over-mix the batter for best results.

How should I store these bars after baking?

First allow the finished brownies to cool completely before cutting. This prevents excess moisture from getting trapped.

Next, store them on the counter for up to four days.

Alternatively, refrigerate the brownies for up to five days in a storage bag or airtight container.

Freeze the brownies for up to three months and individually or in a freezer safe bag. Just microwave before eating or allow them to thaw first.

Brownies on parchment paper

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Stacked banana bread brownies on a table.

The Best One Banana Bread Chocolate Brownie Recipe

Ali Randall
Got a lonely, overripe banana sitting on your kitchen counter? Don’t toss it! Instead, transform it into these delicious banana bread chocolate brownies. 
Prep Time 15 minutes
Cook Time 30 minutes
Cooling Time 15 minutes
Total Time 1 hour
Course Dessert
Cuisine American
Servings 1 dozen


Brownie Batter

  • 2 large eggs
  • 3/4 cup granulated sugar
  • 1/2 cup butter melted
  • 1 teaspoon vanilla extract
  • 1/2 cup about 2 1/8 oz. all-purpose flour
  • 1/3 cup unsweetened cocoa powder
  • 1/4 teaspoon baking powder

Banana Bread Batter

  • 1/2 cup all-purpose flour
  • 1 teaspoon baking powder
  • 1 large whole egg
  • 1/3 cup mashed overripe banana from 1 lonely banana
  • 1/4 cup butter melted
  • 1/4 cup brown sugar packed


  • Preheat oven to 350°F. Line an 8-inch square baking pan with parchment paper, leaving an overhang on all sides.
  • Prepare the brownie batter: Whisk together the eggs, sugar, butter and vanilla in a large bowl. Stir together flour, cocoa and baking powder in a separate bowl. Whisk the flour mixture into the egg mixture until combined.
  • Prepare the banana bread batter: Whisk together the flour and baking powder in a medium bowl. Whisk together the egg, mashed banana, butter and brown sugar in a separate mixing bowl until mixed. Add the flour mixture to the banana mixture, stirring together until combined.
  • Spoon half of the brownie batter into the parchment covered baking pan and spread evenly to the edges with a rubber spatula. Pour the banana bread mixture on top, and smooth evenly with the back of a spoon. Spoon the remaining brownie mixture on top. Using the back of a clean spoon, stir gently to swirl the batters together.
  • Bake the brownies until a wooden toothpick inserted in center of the brownies comes out clean, about 25 to 30 minutes. Transfer the pan to a wire rack, allowing it to cool for 15 minutes.
  • Remove the brownies from baking pan using the parchment paper. Allow the brownies to cool completely before cutting into squares.
  • Store the brownies in an airtight container for several days or freeze.
Keyword Banana Bread, Brownies, One Banana
One Banana Chocolate Brownies are a great way to use up that lone brown banana.

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