1. Mix red chilli powder, ginger garlic paste, salt and curd together. Marinade is ready.
2. Now mix the raw chicken in the marinade and keep it in the refrigerator overnight.
3. Then roast the marinated chicken in a tandoor or an oven for about 5-10 minutes till it is three fourth done.

For the Gravy:

1. heat white butter in pan.
2. Add black cumin seeds, tomato puree, sugar, red chilli powder and salt. Mix it well.
3. Now add the prepared chicken, white butter, fresh cream, sliced green chillies and crushed fenugreek leaves.
4. Cook till chicken is done. Butter Chicken is ready to eat. Serve hot with rice or naan