A cook or private chef is a household staff member responsible for food preparation.
The term can refer to the head of kitchen staff in a great house or to the cook-housekeeper, a far less prestigious position involving more physical labour.
The cook is also responsible for the ordering of food, the maintenance of the kitchen and for keeping accounts with local merchants.
In large households, especially at a noble or royal court, this comprises an elaborate hierarchy, at the bottom of which come the kitchen boys (who, despite the name, were not always minors), in the largest households even further subdivided, perhaps the lowliest position being that of spitboy or turnbroach, who had to remain close to the hot fire to turn the roasting meat; there were six at Hampton Court palace in Henry VIII's reign.
Few modern families can afford retinues of domestic workers, so the cook is often expected to be a cook-housekeeper and responsible for cleaning and nannying as well.