Ingredients:

½ pound sweet baker's chocolate
1 quart milk (or ½ milk, ½ water)
2 teaspoons cornstarch

Directions:

Break chocolate into small pieces and place in a saucepan with milk. Heat slowly, stirring with a whisk until just before the boiling point. Dissolve cornstarch in a few tablespoons water. Add dissolved cornstarch to chocolate mixture and stir constantly until the liquid thickens. Serve hot in warmed cups.