Ingredients
Equipment
Method
Step‑by‑Step Instructions
- Preheat your oven to 375°F (190°C) and grease a 15x10-inch jelly roll pan.
- Combine sugar, sour cream, softened butter, and eggs in a mixing bowl; blend until smooth, about 2-3 minutes.
- Fold in mashed bananas and vanilla extract until well combined.
- Gradually mix in flour, baking soda, and salt until smooth and fully combined.
- If using, gently fold in chopped walnuts or chocolate chips.
- Pour the batter into the greased jelly roll pan, spreading it evenly.
- Bake for 20-25 minutes until golden brown and a toothpick comes out clean.
- Prepare the brown butter frosting by melting butter in a saucepan until golden brown, about 5-7 minutes.
- Remove from heat and whisk in powdered sugar, vanilla, and milk until smooth and creamy.
- Spread frosting evenly over the warm brownies.
Nutrition
Notes
Store brownies in an airtight container at room temperature for up to 3 days or in the fridge for up to a week. Can be frozen for up to 3 months, frost after thawing.