Banana Nut Brownies

I've been buying bananas in excess again but slightly because I have found a plethora of banana recipes I want to try.  This is called a brownie recipe but I would like to taste more chocolate than you do in this one.  Maybe a handful of semi sweet morsels would help...  Anyway, Eric said he's assuming they are healthy since they contain fruit :)

1 stick butter, melted and cooled
1 c sugar
3 tbsp baking cocoa
2 eggs, lightly beaten
1 tbsp milk
1 tsp vanilla extract
1/2 c all purpose flour
1 tsp baking powder
3 small ripe bananas, mashed
1/4 c chopped nuts
Confectioner's sugar (optional)

Preheat oven to 350 F.  In bowl combine butter, sugar, and cocoa.  Stir in eggs, milk, and vanilla.  Blend in flour and baking powder.  Stir in banana and nuts.  Pour into a greased 8x8 square pan and bake 45 minutes or until the top of brownies spring back when you touch.  Cook on a wire rack.  Dust with confectioner's sugar just before serving if desired.