Take a bowl, separate egg yolks and whites. Mix shugar & oil in egg yolks and mix well.

Add vanilla extract in it. Then add cake flour.

Fold with light hands. Pour in to two greaced and lined cake tins. And bake it at 180° at 30 mins or till done.

And salt & baking powder in it and mix till combine. Also add water and mix.

Beat egg whites. Beat well with shugar till its peaks gone glossy and soft peaks. Then fold the egg whites in flour mixture.

Put shugar in pan and place stove on low flame till the shugar gone caramelized. Put boiling water stir it then add evaporated milk or half & half and whisk continuously.

Another hand mix milk, corn flour and egg yolks together, give them a good whisk.

Pour it in the caramel mixture and continuously till mixture got thickened consistancy.

Add vanilla extract & butter in caramel and mix it well and let it cool. To make butter cream royal icing. Beat egg whites with shugar or vanilla essence then put butter cubes 1 by 1 and keep beating.

Put it in icing bags. Spread caramel icing on 1 layer then put the 2nd layer on it.

Cover with caramel icing and decorate as want.

I m also using chocolate ganache. Its optional. Decorate, cut & enjoy.