1.Always wash your hand first
2.In a medium sized bowl,melt the butter on high for 1 minute
3.Stir the eggs,sugar,and vanilla
4.Beat the mixture well
5.Stir in the flour,baking powder,and cocoa.Use a sieve.
add some chopped nuts if want to.
6.Spread the mixture in 20cm baking dish.Microwave on high for 5 to 7 minutes.
8.Then add some sprinkle on the icing sugar