Boil in a double boiler one pint of milk, three tablespoons of rice and two tablespoons of granulated sugar. It will take from fifty to sixty minutes for the rice to be thoroughly cooked, and the mixture to thicken. Remove from the fire and when a little cool, add one tablespoon of vanilla and the yolk of egg into which one tablespoon of flour has been smoothly stirred. Mix all thoroughly together, then pour, by spoonfuls, on hot buttered griddle. Let the cakes brown on one side, and turn over, and brown on the other.