Take soft butter and sugar in a big bowl.
Whisk them using electric beater or hand blender. The colour of butter will begin to change from yellow to light cream.
Add roughly crushed ghee residue and whisk it too until thoroughly combined.
Then add curd and milk and mix well.
Put a sieve on the bowl and add flour, baking powder and baking soda in it.
Sift the ingredients to the bowl.
Add green cardamoms, cardamom essence, saffron essence and vinegar.
Give it a good mix but don't overdo.
Transfer the batter in a cake tin lined with greased butter paper.
Level the batter by tapping the cake tin and decorate it with nuts.
Bake in a pre-heated oven @180°C for 40-45 minutes or until toothpick comes out of it clean.
Let the cake cool down completely before inverting.
Slice and enjoy.