CAROLINA SWEET POTATO PONE

One qt. sweet potatoes, peeled and grated; pour over the grated potato 1 pint boiling water, stir it well; add 1 tea-cup brown sugar, 2 tea-cups molasses, 2 tablespoons butter, 1 heaping tablespoon powdered ginger, 1 tea-cup milk; pour into a baking dish and bake slowly for about 2 hours.