Ingredients
Scale
For the Brownies
- 2 eggs
- 3 bananas, mashed
- 1 ½ cups sugar
- 1 cup sour cream
- ½ cup butter, softened
- 2 teaspoons vanilla extract
- 2 cups all-purpose flour
- 1 teaspoon baking soda
- ¾ teaspoon salt
- ½ cup walnuts, chopped
For the Frosting
- ½ cup butter
- 3 cups powdered sugar
- 1 ½ teaspoons vanilla extract
- 3 tablespoons milk
Instructions
- Preheat the Oven: Set your oven to 375°F (190°C). Grease a 13 x 9 inch baking pan thoroughly to ensure the brownies don’t stick.
- Mix the Wet Ingredients: In a large bowl, beat together the sugar, sour cream, softened butter, and eggs until the mixture is smooth and creamy. This step is key for a soft and moist texture!
- Add the Bananas and Vanilla: Fold in the mashed bananas and vanilla extract. These two ingredients add that unmistakable banana bread flavor we all know and love.
- Incorporate the Dry Ingredients: Gradually mix in the flour, baking soda, and salt. Blend for about a minute to ensure all the ingredients are evenly combined.
- Add the Walnuts: Stir in the chopped walnuts, which add a delightful crunch to each bite. If you’re not a fan of nuts, feel free to skip this step.
- Bake: Spread the batter evenly in your prepared pan. Bake for approximately 25 minutes or until the top turns golden brown and a toothpick inserted into the center comes out clean.
- Prepare the Frosting: While the brownies are cooling, heat the butter in a large saucepan over medium heat until it reaches a medium brown color. Carefully watch it to avoid burning.
- Finish the Frosting: Remove from heat and gradually whisk in the powdered sugar, adding the milk little by little until the frosting reaches a smooth, spreadable consistency. Stir in the vanilla extract for an extra hint of sweetness.
- Frost and Cool: Pour the frosting over the warm (but not hot) brownies and spread evenly. Allow the banana bread brownies to cool completely before cutting into squares.
Notes
- Ripe Bananas: For the best banana flavor, use overripe bananas with brown spots. They’ll add natural sweetness and moisture.
- Avoid Overmixing: When combining the wet and dry ingredients, mix just until everything is incorporated. Overmixing can make the brownies dense.
- Browned Butter Frosting: This step adds a nutty, caramel-like flavor to the frosting. Make sure you don’t over-brown the butter, or it may taste burnt.
- Nuts or No Nuts: If you have a nut allergy or prefer a smooth brownie, you can leave out the walnuts without affecting the texture too much.
- Prep Time: 15 minutes
- Cook Time: 25 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Nutrition
- Serving Size: 1 square
- Calories: 310 kcal
- Sugar: 28g
- Sodium: 180mg
- Fat: 14g
- Saturated Fat: 8g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 45g
- Fiber: 1g
- Protein: 3g
- Cholesterol: 50mg
Keywords: Banana bread with frosting, Fudgy banana brownies, Brown butter banana brownies