Heat butter in a pressure cooker,saute drumsticks,onions, potatoes on medium flame for 2 mins.

Add 2 cups water and pressure cook for 3 whistles.

Allow the air to escape from the lid.

Blend the mixture, along with milk and 1 1/2 cup water in a mixer to a smooth paste.

Strain the mixture through strainer.

Transfer the mixture in a non -stick pan,add salt and pepper corns,mix well and cook on medium flame for 3 mins.

Serve hot.