Only the most serious of chocoholics can handle this decadent, spicy treat!
1. Heat the ingredients, except the cinnamon sticks, while whisking constantly until the mixture begins to simmer.
2. Remove from the heat, add the cinnamon sticks and set aside for 5 minutes.
3. Return to the heat and simmer for 3 minutes, while whisking constantly.
4. Remove from the heat, remove the cinnamon sticks and serve.
TIP Give the hot chocolate an extra kick by replacing the bittersweet chocolate chips with chilli chocolate.