Chocolate Pudding

2 squares chocolate
pinch of baking soda
2 eggs, separated
1/2 cup sugar
1 T butter
2 cups milk
1 tsp vanilla

Separate the eggs. Melt chocolate in a little water with a pinch of soda in a double boiler. Reduce heat. Beat the egg yolks. Stir a spoon of the chocolate into the beaten eggs. Add the egg mixture slowly into the chocolate, stirring briskly. Add most of the the sugar gradually (reserve a T for the egg whites) and continue stirring constantly until the mixture thickens. Remove from heat. Beat the egg whites with 1 T sugar and the vanilla until stiff. Fold into the pudding mixture while still hot. Chill several hours before serving.