1. Place dry ingredients in your mug and mix well with a fork.
2. Whisk in egg then add milk, oil and vanilla. Mix well.
3. Add chocolate chips. Push a dollop of peanut butter or Nutella
into the center of the batter if desired.
4. Cook in microwave for three minutes — don’t worry if the cake
rises over the top of the mug.
5. Leave to cool for 1 minute then sprinkle a few rounds of red chili over top.