Instructions for Banana Bread Brownies

• Preheat oven to 375 degrees F and grease a 9x13 inch pan with non-stick cooking spray.
• In a large bowl, cream together the sugar and butter. Beat in the sour cream and eggs, bananas and vanilla extract.
• Add the flour, baking soda, salt, and mix just until moistened. Stir in walnuts, if using.
• Spread batter evenly into prepared pan and bake for 23-28 minutes or until a toothpick inserted in the center comes out clean, or with few crumbs. Make frosting while the bars bake.
• Heat the butter in a large skillet over medium heat. Allow it to come to a simmer until it starts to turn a delicate brown and has a nutty aroma. Remove from heat immediately.
• Whisk in the powdered sugar, vanilla extract and 1 tablespoon of milk until smooth. (Add a little more powdered sugar, or milk, if needed to thicken or thin the frosting). Pour the warm frosting over the warm bars. Spread gently with the back of a spoon.