CHOCOLATE BLANC MANGE

Thicken a quart of milk with four level tablespoonfuls of cornstarch rubbed smooth with a little of it, add a pinch of salt, a teaspoonful of vanilla, sugar to taste, and a square of bitter chocolate grated and cooked to a smooth paste in a little boiling water. Cook, while stirring, until smooth and thick, mould, chill, and serve with custard or whipped cream.