Place all the dry ingredients in a mug or a ramekin and combine well.
Add the egg, ...
...
coconut oil and stevia and mix well using a fork.
Microwave on high for 70-90 seconds.
Preheat the oven to 175 °C/ 350 °F and cook for about 12-15 minutes or until cooked in the centre.
When done, you can optionally top the mug cake with whipped cream or creamed coconut milk or full-fat yogurt and add a pinch of vanilla powder or cinnamon.
Enjoy!