First of all separate egg whites and egg yolks.

Now take egg white and start beating it untill it becomes fluffy.

Now take another bowl add egg yolks,sugar, vanilla extract and oil and beat it well.

Now take a sieve add all-purpose flour,baking powder,salt in it and sieve it three times.

Now add part by part All-purpose flour in egg yolks mixture and mix well.

Now add egg whites which we kept side add in this better and do not over mix use cut and fold method in it

Now pour this mixture in greased pan.

I take rectangular glass bowl.

And I separate little cake better for green part of cake.which I add in center.

Now bake in preheated pateela for 30 - 35 minutes.

After 35 minutes.take out from pateela and let it cool.

Cut in half.

Now it's time for decoration

Take chillled Whipping cream and chilled bowl and start beating cream add icing sugar part by and beat untill stiff peaks form.

Now make soaking syrup. Take milk 1/4 cup milk add powder sugar in it.and mix it.

Soak spounch cake with milk and sugar syrup.

Now apply whip cream in each layer and cover the whole cake with whipped cream.

Now take remaining whipped cream divide into 2 piping bags. take a piping bag place star nozzle and add whipped cream in it.and add green colour in another whipped cream piping bag.

Make white part of flag with white whipped cream piping bag.

Now make green part with green whipped cream piping bag.

Then make moon and star with white whipped cream.

Now our Flag cake is ready.Enjoy...