First mix all dry ingredients

Thn mix butter chocolate and milk made in another bowl

After that slowly slowly put dry mixture in it..

Thn bake it in a oven for 180° for 30 mins

Then after cooling down cut 3 slices in between

Thn apply whipped cream and make a level

After that take a dough and roll with a rolling pin and give round shape

And design as per ur requirement....