Step 1
Warm the milk with the cinnamon, cardamom pods, and chilli powder in a heavy-based saucepan set over a medium heat.
Step 2
Once hot to the touch, add the chocolate and stir over a low heat for about 5 minutes until thickened.
Step 3
Remove from the heat and stir in enough sugar to sweeten as desired; you may not need to add any sugar, so taste first. Discard the whole spices.
Step 4
Stir in the oats. Transfer the contents of the saucepan to a blender, and blend on high until smooth, scraping own the sides as needed.
Step 5
Divide between glasses and serve warm.