Buttermilk Banana Bars

In a large mixing bowl, combine the flour, sugar, baking powder and salt. Make a well in the center of the dry ingredients. Add the oil, buttermilk, mashed banana and eggs.

Beat with a mixer on low until combined, then at medium speed for 1 minute. Fold in walnuts.

Spread in a greased and floured 15" x 10" jelly-roll pan. Bake at 350 degrees F for 30-35 minutes or until a toothpick inserted in the center comes out clean. Cool completely.

For Frosting: In a medium mixing bowl with a mixer on low speed, beat together cream cheese, butter and vanilla until smooth. Gradually add powdered sugar, beating the mixture on medium speed till light and fluffy.

Spread over the cooled dessert. Cut into bars.