Grease and flour a 2 qt. Mold. Combine flours, corn meal, soda , salt. Stir in molasses, buttermilk. Turn into mold, cover tightly. Place on trivet in deep kettle. Add enough boiling water to kettle to come half way up sides of mold; cover. Steam 3 1/2 hr., or until done. Remove from mold to cake rack. Serve hot with baked beans. Makes 1 loaf