This is just a rough guide - the milk and sugar form the base, play with the rest as much as you want.

4 pints of milk 16 dessert spoons of dark brown sugar
4 teaspoons of butter
4 teapoons of vanilla essence
2-3 teaspoons of mixed spice
1 plastic cup of double cream
around 2 plastic cups of dark rum
2-3 plastic cups of Honeycomb Harvest ice-cream

Mostly it was a case of putting the milk and sugar into a large saucepan over a low heat, then adding other ingredients to taste as we heated it all up. Remember to taste test frequently and keep stirring it.