Banana bread brownies

Step 1

Preheat oven to 375 degrees F and grease a 9×13 inch pan with non-stick cooking spray.

Step 2

In a large bowl, cream together the sugar and butter. Beat in the sour cream and eggs, bananas and vanilla extract.  

Step 3

Add the flour, baking soda, salt, and mix just until moistened. Stir in walnuts, if using.

Step 4

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.

Step 5

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 (watch carefully so you don't burn the butter!) Remove from heat immediately.

Step 6

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.