Take chicken tikka and cut into small pieces.
Heat oil in a pan, add chopped onion and fry till golden brown in colour,add ginger garlic paste.
Add chilli powder and tomato puree and cook it.
Add chicken butter masala in water and make paste and cook it along with tomato puree till it leaves the sides of the pan.
Add cut chicken pieces in that pan ,add cream and milk.
Bring to boil and simmer for few minutes on low heat.
Garnish with cream and butter on top.