Preheat oven to 350°F.

Grease a 9×13 inch baking dish with non-stick cooking spray.

Using an electric mixer, beat butter at medium speed for 30 seconds.

Mix in sugar, baking soda, baking powder and salt.

Mix in eggs and mashed banana.

Beat in flour and cocoa powder.

Pour batter into prepared pan.

Bake brownies for 20-25 minutes or until a toothpick inserted comes out clean.

Remove from oven and allow brownies to completely cool before adding frosting.

While brownies are cooling, use an electric mixer to beat together cream cheese, butter, powdered sugar, strawberry jam and milk until smooth and creamy.

Spread frosting over cooled brownies. Garnish with whipped cream, chopped walnuts and a cherry if desired.