Place the yeast in a bowl and gradually add the milk, stirring to dissolve. Stir in the flour and salt until the mixture is smooth. Cover with a towel and let stand at room temperature overnight or for about twelve hours.

Stir in the molasses, baking soda, egg, and oil or butter.

Heat a griddle to about 350°F., or until a drop of water sputters on the surface. Grease lightly with shortening.

Pour or spoon the mixture onto the griddle to make cakes about two and one-half inches in diameter. Cook until surface bubbles and the cakes are set and lightly browned on underside. Turn, and brown the second side.