Blend half of the apple pieces with the wet ingredients.
In a bowl stir together the flour, sugar and cinnamon powder.
With a spoon mix the wet ingredients into the flour mix until you have a uniform batter.
Stir the remaining apple pieces into the mix.
Pour the batter into a microwave safe mug.
Place the mug into the microwave and "cook" it for 1 minute.
If your mix is still a bit raw just microwave for another 10 seconds at a time until it is cooked.
Enjoy your apple mug cake with some vanilla nice-cream and berries on top!