break the sweet chocolate into pieces and then add them to a heat-resistant bowl together with the cold butter and cold cream. Place this over a pan with boiling water.

Gently melt the chocolate and stir until you get a glossy chocolate paste.

Pour the cacao powder and shaved chocolate shavings (or whatever decoration you are using) into separate bowls. Once the chocolate has melted, take it off the heat and let it cool down again until lukewarm. Then coat the buttercream balls with the melted chocolate.

Remove the toothpick carefully and drop the ball in the cacao…

…or chocolate shaving.

Then transfer the truffles to a clean plate. Assemble the remaining truffles. Then let the truffles set in the fridge for at least another 30 minutes. Serve cold.