Stir together flours, cornmeal, baking powder, soda, and salt. Combine egg, molasses, sugar and oil. Add flour mixture to molasses mixture alternately with buttermilk; beat well. Stir in raisins. Turn batter into two well greased 16 ounce vegetable cans. Cover cans tightly with foil. Place cans in crockery cooker. Cover and cook on high heat setting for 3 hours.
Remove cans from cooker. Cool 10 minutes in cans. Serve warm.
Makes 2 loaves.