Cornmeal Ginger Bread

Mix two cups yellow cornmeal, 1/2 cup molasses, 1 cup sugar, 2 tablespoonfuls shortening, 1 teaspoonful salt, 1 cup of sour and 1 cup of sweet milk together in a double boiler and cook over hot water for about 10 minutes after the mixture has become hot. Let cool, add 1 cup wheat flour and 1 1/2 teaspoonfuls soda, 1 teaspoonful cinnamon and 1/2 teaspoonful each ginger and cloves, sifted together, then 1 egg well beaten.