Banana Sour Cream Cake

This recipe comes from a Kraft foods magazine that I got while in Atlanta.  It is moist and delicious.  I took a picture (it was quite impressive since I seldom make desserts) on Clark's camera and he has since misplaced it so I am posting without a picture.  Use your imagination.  Very Easy.

Banana Sour Cream Cake

1 pkg yellow cake mix
3 eggs
1 cup sour cream
1/4 cup oil
1 cup mashed ripe bananas (about 3)
Icing:
1 pkg (8 oz.) cream cheese, softened
1 stick butter, softened
1 pkg (16 oz.) powdered sugar (about 4 Cups)
1 cup finely chopped walnuts or nuts of your choice

Heat oven to 350 degrees.  Beat together cake mix, eggs, bananas, sour cream and oil with mixer on low until moistened, scraping bottom of bowl often.   Beat on medium for 2 minutes and pour into greased and floured 13 x 9inch cake pan and bake for 35 minutes or until toothpick comes out clean.   Cool completely in pan on wire rack.
Beat cream cheese and butter until blended and gradually add sugar, beating well after each addition.  Remove cake from pan and carefully cut cake crosswise in half, using a serrated knife.  Place one half, top-side down on a plate and spread top with frosting.   Top with remaining cake half, top-side up and frost top and sides.  Press nuts onto sides.  Can sprinkle nuts on top if desired.  Left-overs need to be refrigerated.
For me there was too much icing so I wrote myself a note to leave the cake in the pan, make less icing and just sprinkle nuts on the top.   Not near as fancy looking but tastes the same.