Step 1: Prepare the Oven and Baking Pan
Preheat your oven to 180°C (350°F).
Grease a rectangular baking pan, approximately 9 × 13 inches, with butter or cooking spray.
Line the bottom with parchment paper, leaving a little overhang on the sides to make removing the brownies easier.
Step 2: Mash the Bananas
Peel the three ripe bananas and place them in a large mixing bowl.
Mash them thoroughly using a fork until they become a smooth mixture with a few small lumps remaining.
The riper the bananas, the sweeter and more flavorful your brownies will be.
Step 3: Mix the Wet Ingredients
Add the eggs, granulated sugar, sour cream, melted butter, and vanilla extract to the mashed bananas.
Whisk everything together until the mixture becomes smooth and creamy.
Make sure the melted butter has cooled slightly before adding it to avoid cooking the eggs.
Step 4: Combine the Dry Ingredients
In a separate bowl, whisk together the flour, baking soda, salt, and ground cinnamon.
Gradually add the dry ingredients to the banana mixture.
Using a spatula, gently fold everything together until just combined.
Avoid overmixing, as this can make the brownies dense instead of soft and tender.
Step 5: Pour into the Baking Pan
Pour the banana batter into your prepared baking pan.
Spread it evenly using a spatula, making sure the corners are filled.
Gently tap the pan against the countertop to remove any large air bubbles.
Step 6: Bake Until Golden
Place the pan in the preheated oven.
Bake for approximately 25–30 minutes, or until the top is lightly golden and a toothpick inserted into the center comes out clean or with a few moist crumbs.
If the center needs more time, continue baking for a few additional minutes.
Remove from the oven and allow the brownies to cool.
Step 7: Prepare the Vanilla Cinnamon Glaze
While the brownies are cooling, prepare the delicious glaze.
In a medium bowl, combine the powdered sugar, melted butter, vanilla extract, and cinnamon.
Gradually add the milk, one tablespoon at a time, whisking until the glaze becomes smooth and pourable.
If it is too thick, add a little more milk. If it is too thin, add additional powdered sugar.
Step 8: Glaze and Slice
Once the brownies have cooled until just slightly warm, pour the vanilla cinnamon glaze over the top.
Spread it evenly using a spatula.
Allow the glaze to set for approximately 15–20 minutes.
Cut into squares using a sharp knife and serve!
Tips for Perfect Banana Bread Brownies
- Use very ripe bananas with brown spots for the sweetest flavor.
- Measure the flour correctly to avoid dry brownies.
- Use full-fat sour cream for a richer, softer texture.
- Allow melted butter to cool before mixing.
- Avoid overmixing the batter after adding flour.
- Check the center with a toothpick to prevent overbaking.
- Let the brownies cool before adding the glaze.
Delicious Variations
Chocolate Chip Banana Brownies: Add ½ cup of chocolate chips to the batter before baking.
Walnut Banana Brownies: Fold in ½ cup of chopped walnuts for extra crunch.
Coconut Banana Brownies: Add ½ cup of shredded coconut for a tropical twist.
Caramel Banana Brownies: Drizzle caramel sauce over the vanilla glaze before serving.
Peanut Butter Banana Brownies: Swirl ¼ cup of creamy peanut butter into the batter before baking.
Storage Instructions
- Room Temperature: Store in an airtight container for up to 1 day in a cool environment.
- Refrigerator: Keep covered for up to 5 days because of the sour cream glaze and moist texture.
- Freezer: Freeze individual unglazed squares for up to 2 months. Thaw in the refrigerator and add fresh glaze before serving.
Frequently Asked Questions
Are banana bread brownies supposed to be fudgy?
These brownies have a soft, moist, and tender cake-like texture rather than the dense texture of traditional chocolate brownies.
Can I use Greek yogurt instead of sour cream?
Yes! Plain full-fat Greek yogurt works as a substitute and provides a similar creamy texture.
Can I make them without the glaze?
Absolutely! They taste delicious on their own, but the vanilla cinnamon glaze adds extra sweetness and flavor.
How do I know when they are ready?
Insert a toothpick into the center. It should come out clean or with a few moist crumbs, but not wet batter.
Final Thoughts
These banana bread brownies are the perfect combination of homemade banana bread and a delicious glazed dessert.
They’re soft, sweet, wonderfully moist, and topped with a creamy vanilla cinnamon glaze that makes every bite irresistible.
If you have a few ripe bananas sitting in your kitchen, this is the perfect recipe to turn them into something special. Enjoy! 🍌❤️
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