Mix all of the ingredients together in a bowl and transfer to a mug. Leave a little bit of space at the top of the mug to allow the muffin to rise.
Put in the microwave for 2-3 minutes
Reduce or increase the time for a harder consistency/softer centre.
This will make a LARGE muffin so divide appropriately between mugs or store in the fridge.
Please note: this recipe has been created and uploaded by a member of the Tesco Real Food online community. Tesco does not test customer recipes so cannot accept responsibility for the content, validate the results or answer queries regarding them.