In a bowl whisk milk, butter, vanilla essence and sugar.
Add this to the dry ingredients (flour and baking powder)
Now add the blueberries or chocolate chips and mix well.
Pour the batter in small cups or bowl or a big coffee mug. Fill the mug half as the cake will rise.
Microwave on high for 1 minute. Stick a tooth pick in the centre of the cake, if it is covered with batter, microwave another 30 seconds and so on. (It will take less than 2 minuteOnce the toothpick is clear, the cake is done.
Top with dusted sugar and blueberries. Serve warm.