Mix all the powders in a mug. Slowly add the rest of the ingredients and mix until combined. Place a big chunck of chocolate in the middle of the batter.
Put in the microwave for one minute and check for doneness. Add time by 15 seconds at a time. Every microwave is different so you will have to play a bit with the time.
For the whipped coffee
Add all the ingredients in a tall glass and whip with an immersion blender until you have a delicous frothy coffee cream.