In a heatproof bowl, combine the dark chocolate and butter. Set the bowl over a pot of simmering water, stirring occasionally until melted and smooth.

Remove from heat and stir in the heavy cream, sugar, vanilla extract, and salt until completely smooth and combined.

Pour the mixture into a lined baking dish and smooth the top. Refrigerate for at least two hours, or until set.

Once set, remove from the fridge, and using a sharp knife, cut into bite-sized pieces. Optionally, coat or top with sprinkles, crushed nuts, or cocoa powder.

Arrange on a beautiful platter and share with your loved ones!