Break the chocolate into small pieces similar in size, place in a bowl over a pot of gently simmering water and melt, stirring occasionally (alternatively melt in a microwave). Remove from the heat when 90% of the chocolate has melted. Stir to help the mixture melt completely.
Combine the melted chocolate with both cheeses, sugar, liqueur and stir thoroughly until smooth. Divide the mixture into 4 small cups, sprinkle with dark/white chocolate shavings (I used a vegetable peeler to make the shavings), refrigerate for 30 minutes (if possible), and serve. Keep refrigerated.
You can swap the Tia Maria for another coffee liqueur if you prefer.
Melt the chocolate slowly over a pot of simmering water. Remove from the heat when 90 % of the chocolate has melted. Stir to help the chocolate melt completely. Alternatively melt the chocolate in the microwave.
Use good quality dark chocolate - 65-75% cocoa solids.
Double the ingredients if you are making this dessert for a larger crowd. The proportions in this recipe will be enough to make 4 small portions.
Chill for at least 30 minutes before serving. Keep refrigerated for up to 3 days.