In a mixing bowl beat and whisk the egg and add sugar and vanilla extract to it and mix well.
Add flour to it and fold it well until it incorporates well with other ingredients.
Pour in butter and again give a good stir.
Now take a microwave safe bowl and spray it well. stand in well sprayed glass ( ( shot glass or glasses used for tea).
Pour half of the batter around the glass and set the microwave on high and microwave it for 1 minute.
Cool the bowl and release the glass and make upset down of the bowl to release the doughnut.
Roll the dought nuts in powder sugar to make sugar doughnuts.
Yummy , Instant Doughnuts are ready.