Chocolate, mousse-filled towers can be the perfect dessert for a dinner party; they look sophisticated, taste great and can be surprisingly easy to make. The combination of creamy mousse and crispy chocolate is sure to be a winner, and the towers don't even require an oven for baking, though you will need to use a freezer. As with all desserts, make sure you use the very best ingredients to ensure the optimum level of tastiness.
Tape six of your parchment sheets into tube shapes.
Beat the cream and mascarpone together in a bowl until stiff. Add the cocoa and mix in well.
Using a double boiler, or a Pyrex bowl in a pan of boiling water, melt the dark chocolate and butter and then fold the melted liquid into your cream and mascarpone mix.
Place the mixture in a pastry or piping bag and pipe carefully into the six parchment tubes, standing them upright on a plate. Smooth off the mixture at the tops, ensuring it is even.
Freeze your tubes for several hours until they are firm, then remove the parchment. These are your mousse tubes.
Take another six sheets of parchment and drizzle with the melted white chocolate, in a loose grid patten. Wrap each parchment around a mouse tube, with the chocolate inward, and refrigerate for 5 to 10 minutes. Remove the parchment and repeat the process but this time using the melted dark chocolate. Your towers are now ready to be served.