In a bowl,add sifted flour,cocoa powder,baking soda,baking powder. Mix well. Set aside

In a mixing machine,add butter,caster sugar and beat.

During beating add egg,vanilla essence,milk and dry ingredients gradually and beat until well combined.

Take a cupckae tray,add lining add batter and tap tray 2-3 times

Bake in a pre heated over at 175 C for 20-25 mins.