Can hot food go straight into the cool room?

Two stages, two clocks

The rule for cooling cooked food is clause 7(3) of Standard 3.2.2, and it is a rule about time as much as temperature:

A food business must, when cooling cooked potentially hazardous food, cool the food (a) within two hours, from 60°C to 21°C; and (b) within a further four hours, from 21°C to 5°C; unless the food business demonstrates that the cooling process used will not adversely affect the microbiological safety of the food.

Food Standards Australia New Zealand states the same rule in one sentence: when cooling cooked potentially hazardous food, it must be cooled from 60°C to 21°C in two hours or less, then cooled further from 21°C to 5°C in four hours or less. The agency is equally clear about the escape clause: a business can use a different cooling process, but must be able to show that it keeps the food safe. The ACT Government's guidance words it the same way: from 60°C to 21°C in no longer than two hours, then from 21°C to 5°C in no longer than four.

The stages exist because the middle of that range is where growth happens. The clause before it asks that the time potentially hazardous food spends at temperatures that permit the growth of infectious or toxigenic microorganisms is minimised, and FSANZ's summary on its cooling page is that businesses must make sure potentially hazardous food is cooled or reheated quickly so harmful microorganisms do not get a chance to grow to unsafe levels.

What counts as cooked food for this clause is the ordinary kitchen list: cooked meat and poultry, egg dishes, cooked rice and pasta, and the other foods FSANZ lists as potentially hazardous. The Food Standards Code defines potentially hazardous food as food that has to be kept at certain temperatures to minimise the growth of any pathogenic microorganisms in it, or to prevent the formation of toxins.

One tray, worked through

A tray of cooked rice comes off the heat at 60°C. From that moment it has two clocks, and both are clause 7(3)'s, not the 2-hour/4-hour rule's.

1. First clock: the tray has two hours to fall from 60°C to 21°C.
2. Second clock: from 21°C to 5°C, it has a further four hours, so six hours in all from the moment it left the heat. FSANZ's one-sentence version of the same two clocks is a useful check on the arithmetic.
3. If the tray misses a clock, the clause offers one route out: a different cooling process is allowed where the business can show the process does not adversely affect the food's microbiological safety. FSANZ puts the same route in plainer words: you can use a different cooling process, but you must be able to show that it keeps the food safe.
4. Once the tray has been cooled through both stages, it is safe to store in the fridge to use later. If it comes back out of refrigeration later, the clock starts again and the 2-hour/4-hour guide applies from there.

The ACT Government publishes the flat limit that sits under this kind of case: the maximum time potentially hazardous food can be in the band between 5°C and 60°C is four hours, and after four hours any remaining food must be thrown away. Its guidance for food that has been held between the two lines and is then to be refrigerated is that it must not have been there longer than two hours. In its own table:

None of this prescribes a method. The clause says how fast the food must come down, and what must be shown if the kitchen cools it another way; the tray, the bath or the blast chiller are the kitchen's business, and the clocks are the law's. FSANZ sums up the same requirement: a different cooling process can be used, but you must be able to show that it keeps the food safe.

Beside the rule for food left out

The two rules are separate by design. FSANZ's note is explicit that the 2-hour/4-hour rule is a guide for refrigerated food and is separate from the mandatory two-stage cooling process in clause 7(3); its cooling page adds the practical consequence: food cooled by the two-stage process can be stored in the fridge to use later, and the 2-hour/4-hour guide only resumes if the food comes back out of refrigeration.

The worked example for that other rule, a display case found warm at opening, is in When the fridge fails. Both pages count hours; the clock belongs to different food.

What the cool room has to manage

The duty lands on the business, and the equipment is how it is met. If the refrigeration cannot bring food from 21°C to 5°C inside the four hours Standard 3.2.2 clause 7(3) allows, the clause is still met only where the business can demonstrate that the cooling process it used does not adversely affect the food's microbiological safety. FSANZ states the same condition plainly: a different cooling process is allowed, but the business must be able to show that it keeps the food safe. A cool room that cannot keep up is therefore a legal question as well as an operational one.

Two clauses sit either side of it in the Code. Equipment must be maintained in a good state of repair and working order, having regard to its use, and the processing clause asks for the time food spends at growth temperatures to be minimised. The ACT Government's guidance is to record temperature checks, with the date and time they are done and the temperatures measured.

The clause has a second half for food going the other way. Reheating previously cooked and cooled potentially hazardous food for hot holding must use a heat process that rapidly brings the food to 60°C or above, which FSANZ expresses as heating it quickly to 60°C or hotter, ideally in two hours or less. Hot food held at 60°C or above is on the other side of the scale, and the machine guides, Who may fix it and Gas for an older system, are about the equipment that holds the cold line.