Banana Rum Cake 1 (18.25 ounce) box yellow cake mix 1/8 teaspoon baking soda 2 eggs 1/3 cup finely chopped pecans 2/3 cup light rum 2/3 cup water 1 mashed very ripe banana Preheat oven to 350 degrees F. Grease and flour 2 (9-inch) cake pans. Combine all ingredients in a large bowl. Blend well. Pour into pans and bake for 25 to 30 minutes. Frosting 1/2 cup butter 3 cups confectioners' sugar 2 teaspoons vanilla extract 2 tablespoons rum Combine butter and confectioners' sugar and blend well. Stir in vanilla extract and rum. Beat well and spread on cake.