Grease and line your baking pan and pre heat oven to 180 deg

Sift flour and baking powder and set aside

In a bowl cream sugar and margarine, till light and fluffy

Add the egg whites and mix well

Add the vanilla essence and mix well

Now add while alternating flour and milk and mix till well combined but do not overmix

Pour your batter in the greased pan and bake for 40 min or until a tested skewer comes out clean

Let your cake rest in the pan and once cooled transfer to a plate

Your cake is now ready