Potluck Banana Cake Recipe... Potluck Banana Cake Recipe Ingredients 1/2 cup butter, softened 1 cup sugar 2 eggs 1 teaspoon vanilla extract 2 cups all-purpose flour 2 teaspoons baking soda 1/2 teaspoon salt 1-1/2 cups mashed ripe bananas (about 3 medium) 1 cup (8 ounces) Daisy Brand® Sour Cream COFFEE FROSTING: 1/3 cup butter, softened