Chocolate Blanc Mange

4 tablespoons corn starch
3/4 cup sugar
1/4 teaspoon salt
1 quart milk
3 ounces unsweetened chocolate
1 teaspoon vanilla extract

Mix corn starch, sugar and salt together with a little of the cold milk. Put remainder of milk on to scald with chocolate, which has been cut into small pieces. As soon as chocolate is dissolved, stir in the corn starch mixture. Cook until thick and smooth, stirring constantly. Set over hot water and cook about 20 minutes longer. Add flavoring; pour into a mold which has been wet in cold water. Chill, and serve cold with sweetened whipped cream.