In a large mixing bowl beat egg whites until foamy.gradually add sugar powder continuing to beat until very thick.add vanila extract and mix well.
Take a bowl pour melted butter and eggs yolk,milk mix well.add purpose flour and baking powder.now add mixture with beaten eggd white
Grease oil in baking pan.pour batter in the baking pan.bake for 30 minutes.
Take the cake out from the oven and leave for 15mins finally remove the cake from the pan.