Yes I mix milk into the Nestle cereal. But I will mix the milk with water in a seperate bottle first before mixing into the cereal to make sure that the amt of water used is accurate. If too much powder and not enough water, might cause constipation.
Not sure for babies above 1 year old milk intake should be how much. But for babies just below 1 year old, milk intake should be between 600ml - 800ml.