Pour the heavy cream in the saucepan and bring to a boil. Add finely chopped chocolate and mix to melt.

When the chocolate has melted in the heavy cream, remove from heat. Then add the butter and melt it into the chocolate mixture.

Pour into a mold and chill in the fridge. Slice into desired sizes and sprinkle cocoa powder at the end. You can also make round truffles with this recipe! Just roll into balls instead of a square.