Heres a recipe I found somewhere, I have tried it and it comes out quite good cut back on the chilli if you prefer it mild.

MURG MAKHANI RECIPE

Ingredients:
Chicken Marination
800 gms Chicken Pieces (boneless)
1 tsp Coriander Powder
1 tblsp sour Curd
2 tsp Ginger Paste
2 tsp Garlic Paste
1 tblsp lemon juice
1 tsp Cumin Powder
1 Onion paste
1 tsp Red Chilli Powder
Salt to taste
Few drops of orange color

Gravy
4 large tomatoes chopped
4 tblsp Butter
1 tblsp Fresh Cream
1 tsp Coriander Powder
1 tsp Cumin Powder
1 tsp Red Chilli Powder
1 tsp Black Pepper Powder
2 tsp Ginger finely chopped
2 tsp Green Chilly finely chopped
2 tsp (10ml) ground almonds
1/4 tsp (1ml) crushed saffron
salt to taste
sugar to taste

Garnish
Melted Butter
Fresh Cream
Coriander Leaves finely chopped

How to make murgh makhani :
Make small cuts in the chicken pieces.
Mix all the marinate ingredients. Mix the the chicken pieces and the marinate.
Let the chicken marinate for a few hours.

Take half the butter in a heavy bottom wok and put in the chicken with the marinade. Cover it and cook till the chicken is fully cooked. Stir fry the chicken for some time.
Now heat the remaining butter in a saucepan and add the red chilli, coriander, cumin and black pepper powders.
Fry for some time then add the chopped tomatoes, sugar, salt, saffron and cook on medium flame till the puree thickens and the fat separates.
Add the beaten cream and cook on low flame for few minutes.
Then add the chicken pieces along with chopped ginger, almonds and green chillies to the gravy. Cover and simmer on low heat till the curry is hot simmering hot.
While serving pour the melted butter and garnish with fresh cream and finely chopped coriander leaves.
Serve the Murgh Makhani hot with rice or naan.