Banana Sheet Cake with Orange Cream Frosting

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Keller Estate in Arlington, Texas in 1994.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * ¼ cup sifted cake flour
 * 2 teaspoon baking powder
 * 1 teaspoon baking soda
 * ⅓ teaspoon salt
 * ¼ cup dairy sour cream
 * 2 cups mashed ripe bananas
 * 1 cup unsalted butter softened
 * 1½ cups sugar
 * 3 eggs

Orange Cream Frosting

 * ¼ cup unsalted butter softened
 * 1 pound icing sugar
 * ¼ cup orange juice
 * 2 tablespoons grated orange rind
 * shredded orange rind
 * chopped pistachios or walnuts

Directions

 * 1) Preheat oven to 350°F.
 * 2) Generously grease jelly roll pan.
 * 3) Sift dry ingredients together onto wax paper.
 * 4) In small bowl stir together sour cream and banana.
 * 5) In large bowl of electric mixer beat together butter, sugar and eggs for 3 minutes.
 * 6) Stir flour mixture alternately with banana mixture into butter mixture.
 * 7) Beat by hand after each addition until batter is smooth.
 * 8) Pour batter into prepared pan and smooth top with spatula.
 * 9) Bake in preheated 350 oven for 30 minutes.
 * 10) Cool completely on a wire rack then top with frosting.

Orange Cream Frosting

 * 1) To make frosting beat butter until fluffy.
 * 2) Beat in icing sugar alternately with juice until smooth and spreadable.
 * 3) Fold in grated rind then spread evenly over top of cake.
 * 4) Garnish with nuts.