First of all bring the cream to boil and melt the butter.
Then pour on to the chopped chocolate and let to melt.
Heat the bowl in the microwave or on the hob if the mixture is not melting quickly enough.
Leave to cool down until it’s cold to touch, but before it starts to set.
Add the rum and a tiny pinch of salt.
Whisk the mixture by hand using a wooden spoon or with an electric whisk until it’s nicely smooth, fluffy and light in colour.
Let to set a little in the fridge for about 30 minutes (or longer if you want to)
Wearing catering gloves scoop about a heaped teaspoon at a time and roll it into small balls.
Leave to set in the fridge for a further 30 minutes or more.
Melt and temper your chocolate and dip or roll your truffles in the melted chocolate. Tempering is optional (see notes above)
You can either leave your chocolate truffles covered with just the chocolate (and perhaps add cocoa nibs or sugar sprinkles as a decoration or you can also roll them in cocoa powder.
Leave to set in the fridge for further 15-20 minutes.
If you are using cocoa powder to finish your chocolate truffles, take excess cocoa powder off by rolling the truffles in a sieve.
Serve straight away or keep in an airtight container for up to 4 weeks in a cool and dry place.