Chocolate cake

1 cup flour
1 cup icing sugar
1/2 cup cocoa powder
4 eggs separated
1/2 cup icing sugar(separate)
1 tsp vanilla essence
1 tsp lime juice
1/2 tsp baking powder
1/4 tsp baking soda
1/2 cup vegetable oil
1/2 cup water

soft flour,sugar,cocoa and baking powder and baking soda and keep aside.
in a separate bowl,beat together egg yolks,gradually adding the oil and water.Fold in the sifted flour and continue beating.
In a separate bowl beat egg whites with remaining icing sugar until the it forms peaks.Fold into the already beaten mix.
pour into baking tray(no need to grease tray) and cook on high heat for 10 minutes.Turn down oven to 180 degrees and continue baking for 1/2 an hour.
Serve with some hot chocolate sauce.