These Banana Bread Brownies are soft, moist, and rich like banana bread — but baked in a brownie pan and topped with a simple brown butter glaze. They’re thicker than banana bread, slightly chewy at the edges, and incredibly flavorful. Below is a detailed, step-by-step recipe.

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Banana Bread Brownies

Ingredients

For the Brownies

• ½ cup unsalted butter, softened

• 1 cup granulated sugar

• ½ cup light brown sugar

• 2 large eggs

• 1 cup sour cream (or plain Greek yogurt)

• 1 teaspoon vanilla extract

• 2 large ripe bananas, mashed (about 1 cup)

• 2 cups all-purpose flour

• 1 teaspoon baking soda

• ½ teaspoon salt

Optional add-ins:

• ½ cup chopped walnuts or pecans

• ½ cup chocolate chips

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For the Brown Butter Glaze (Highly Recommended)

• ¼ cup unsalted butter

• 2 cups powdered sugar

• 2–3 tablespoons milk

• ½ teaspoon vanilla extract

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Step-by-Step Directions

Step 1: Preheat & Prepare Pan

1. Preheat oven to 375°F (190°C).

2. Grease a 9×13 baking pan or line with parchment paper.

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Step 2: Cream Butter & Sugars

1. In a large bowl, beat softened butter until smooth.

2. Add granulated sugar and brown sugar.

3. Beat 2–3 minutes until light and fluffy.

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Step 3: Add Wet Ingredients

1. Add eggs one at a time, mixing well after each.

2. Mix in sour cream and vanilla.

3. Stir in mashed bananas until combined.

Do not overmix.

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Step 4: Combine Dry Ingredients

In a separate bowl whisk together:

• Flour

• Baking soda

• Salt

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Step 5: Combine Batter

1. Gradually add dry ingredients to wet mixture.

2. Mix just until combined.

3. Fold in nuts or chocolate chips if using.

Batter will be thick.

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Step 6: Bake

1. Spread batter evenly into prepared pan.

2. Bake for 20–25 minutes until:

   • Top is lightly golden

   • Toothpick inserted in center comes out clean

Do not overbake — they should stay soft.

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Brown Butter Glaze

Step 7: Brown the Butter

1. In a small saucepan, melt butter over medium heat.

2. Continue cooking, stirring constantly.

3. Butter will foam, then turn golden brown with a nutty aroma.

4. Remove from heat immediately.

Do not burn.

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Step 8: Make the Glaze

1. Whisk browned butter with powdered sugar.

2. Add milk gradually until smooth and spreadable.

3. Stir in vanilla.

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Step 9: Glaze the Brownies

1. Spread glaze over warm brownies.

2. Let set before slicing.

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Pro Tips

• Use very ripe bananas with brown spots for best flavor.

• For thicker brownies, use an 8×8 pan and increase bake time slightly.

• Sprinkle chopped nuts on top of glaze before it sets.

• Add a pinch of cinnamon for warmth.

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Storage

• Store covered at room temperature up to 3 days.

• Refrigerate up to 5 days.

• Freeze up to 2 months.