Frosted Banana Bars

{adapted from here}

1/3 cup butter, softened
3/4 cup white sugar
2 eggs
1 cup fat free sour cream
1 teaspoon vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
1/4 teaspoon salt
1 cup mashed ripe bananas

Preheat oven to 350 degrees. Grease a 10x15 inch jellyroll pan.

In a large bowl, cream together the butter and sugar until smooth. Beat in the eggs, one at a time, then stir in the sour cream and vanilla. Combine the flour, baking soda and salt; stir into the batter. Finally, mix in the mashed banana. Spread evenly into the prepared pan.

Bake for 20 to 25 minutes in the preheated oven, until a toothpick inserted into the center comes out clean. Allow bars to cool completely before frosting with the cream cheese frosting.

Frosting:

1 (8 ounce) package cream cheese, softened
1/4 cup butter, softened
1 1/2 cup sifted confectioners' sugar
1/2 teaspoon vanilla extract
2-3 tbs milk

In a medium bowl, cream together the cream cheese and butter until creamy. Mix in the vanilla, then gradually stir in the confectioners' sugar. Add milk if needed. Store in the refrigerator after use.