2 squares unsweetened baking chocolate
1/2 cup sugar
3 cups milk
1 teaspoon vanilla
Miniature marshmallows, optional
Place 1 cup water and chocolate in heavy 2-quart saucepan; cook on low heat until chocolate is melted and mixture is blended, stirring constantly with wire whisk.
Stir in sugar. Bring to boil on medium-high heat. Boil three minutes, stirring constantly. Gradually whisk in milk and vanilla. Reduce heat to medium. Cook until mixture is heated through, stirring occasionally. Serve hot with marshmallows.