For sauce, Melt chocolate and cream in a pan., Stir continuously while heating,
Remove from flame and leave it at room temperature. For cake, Beat sugar and margarine till light and fluffy,
Add egg yolks one by one and beat., Sieve flour and baking powder and slowly add in the mixture,
Lastly beat egg whites and pour in the mixture while stirring, add vanilla essence and mix again,
Grease the baking dish and bake in a pre-heated oven for 20-25 minutes at moderate temperature, Spread chocolate sauce and chill.