Step 1: 1. Break chocolate into a heat proof bowl.
Step 2: 2. Then melt over boiling water until melted.
Step 3: 3. On a low heat in another saucepan, add cream, and split the vanilla pod, or add vanilla extract.
Step 4: 4. Leave vanilla and cream to simmer for five minutes.
Step 5: 5. Once the chocolate is melted, add the cream, and vanilla into the bowl with the melted chocolate. And mix well.
Step 6: 6. Melt butter and stir into the chocolate mixture.
Step 7: 7. Leave to chill in the fridge, until set.
Step 8: 8. Once set roll into balls.
Step 9: 9. Roll in icing sugar, or sprinkle over instead.
Step 10: 10. Eat! Only suitable for two days.