Kitchen in North-west i also good. But facing cooking while facing North should be avoided at all times.
South-East kitchen facing east
North-West kitchen facing west
North facing cooking should be avoided.
Why North facing cooking should be avoided ?
Vaastu is all about magnetic energy flow. Magnetic rays flow from N->S So when you face North and cooking basically you are disturbing the magnetic energy and person who is cooking will face health issue. The health issue on head, neck and hand are commonly know things.
So one should avoid cooking facing North at all times.