Butterscotch devil's delight

Ingredients

Dairy

  • 45g of butter, cubed
  • 450ml of double cream
  • 350ml of milk

Store Cupboard

  • 150g of dark muscavado sugar
  • 3 tbsp of cornflour
  • 1/2 vanilla pod, seeds only
  • 1 handful of cacao nibs, to serve