In a small, heavy-bottom pan over low heat, add the chocolate pieces and light cream; heat very gently until the chocolate has melted. Stir until smooth, then remove from the heat and let cool. Learn different techniques for How To Melt Chocolate.
Once the chocolate has cooled, stir in the rum; set aside.
Pour the whipping cream into a large bowl and, using an electric mixer, whip until thick but not stiff. Carefully whisk in the powdered sugar and cooled chocolate mixture into the whipped cream. How to make Basic Whipped Cream
Spoon the mixture into 6 individual serving dishes or glasses, cover with plastic wrap and let chill in the refrigerator for 1 to 2 hours.
NOTE: This dessert looks particularly attractive served in matching tall glasses. You can also use coffee cups or ordinary dessert dishes would work just as well.
To serve, make the chocolate shavings and sprinkle them carefully over the creams before serving.
How To Make Chocolate Shavings - For best results, the chocolate used should be cold, straight out of the refrigerator. If it is room temperature, then the slices will nott turn out paper thin; instead, they will be thick, broken chunks.
To make chocolate shavings, you first need a good quality of chocolate in block form. Using a vegetable or potato peeler, hold the chocolate with a paper towel and pass the vegetable peeler over the narrowest side of the chocolate block. The chocolate will curl up like wood shavings.
Makes 6 servings.