This one will warm you up on a winter's night. Here is my recipe for a very satisfying hot chocolate. So grab a throw, a book and when this is done you'll be curled up with this in no time.
First take whatever dark chocolate bar you have and with a very sharp knife chop it into bits.
When all chocolate is chopped. Divide the chocolate equally amongst cups. I was making two cups so I chopped half of a 85% dark chocolate bar and then added approximately 2 tablespoons of chopped chocolate in each mug. Essentially you are dividing the chocolate between the two mugs. Then on top of the chocolate I added a teaspoon of ground cinnamon. Mixing the chocolate and cinnamon together.
Once the chocolate and cinnamon have been mixed add 2 ccl of good quality rum.
Once the chocolate and cinnamon have been mixed add 2 ccl of good quality rum. 
Mixing together. You should have a bit of a chocolate paste. After this point put two cups of milk into a saucepan and heat on the stove until hot. Whisking frequently.
When the milk is hot remove from stove. Being careful add 2-3 tablespoons of milk into each mug. Blending together. This makes the chocolate paste even more smooth and helps melt the chocolate. Just a quick note adjust your measurements and chocolate to suit the size of mug or cup you are serving it in.
When all is smooth and the chocolate is just about melted add the remaining hot milk into each mug. Give a stir and enjoy! - jw