In a bowl, add sugar and ghee and mix it so well that it's texture will be like cream.

Now add all purpose flour and corn flour in the mixture and mix it well.

Add little milk in it and again mix it.

Now add baking powder and vanilla essence in it and form a dough.

Divide this mixture in two equal halves and add cocoa powder in one half.

Mix both dough separately well.

Now cut both dough in small pieces.

Now take one white dough piece and one cocoa dough and repeat it three times and then combine the together and make balls of it.

Now bake these biscuits for 20-25 minutes on a pre-heated wok or pressure cooker.

Your marble cookies are now ready to serve.