Ingredients
Equipment
Method
Step-by-Step Instructions
- Preheat your oven to 350°F (175°C) and prepare an 8x8-inch baking pan by greasing it or lining with parchment paper.
- Mash the ripe bananas in a large mixing bowl until mostly smooth, leaving a few small lumps for texture.
- Mix in melted butter, granulated sugar, eggs, sour cream, and vanilla extract until combined.
- Sprinkle in the flour, baking soda, and salt, folding gently until just combined.
- If using, fold in chopped walnuts and spread the batter evenly into the baking pan.
- Bake for 25–30 minutes, checking with a toothpick for moist crumbs when done.
- For the frosting, melt unsalted butter in a saucepan until golden brown, about 5-7 minutes.
- Whisk in powdered sugar and then milk until smooth and spreadable.
- Spread the frosting over cooled brownies and sprinkle with additional walnuts if desired.
- Let the frosting set for 10-15 minutes before slicing into squares.
Nutrition
Notes
Store leftovers in an airtight container at room temperature for up to 2 days. Refrigerate for up to 5 days to maintain freshness.
