Banquet Stew: A Cooling Log That Records Only the Failure
At 6:00 p.m. a banquet kitchen finishes 40 L of beef stew. Cooks pour it into two stainless pans 20 cm deep, cover them tightly, and place them in the walk-in cooler at 8:00 p.m. At 10:00 p.m. the night supervisor probes one pan: 32°C. At 8:00 a.m. the same pan reads 12°C. The stew is reheated at 11:00 a.m. in a tilt kettle to 65°C, held for 20 minutes, then transferred to a hot-holding unit set at 60°C for the noon buffet. The kitchen has a calibrated probe thermometer and a cooling log that shows only the final morning temperature. The chef says the stew will be boiled at service, so the slow cooling is not a problem. No one recorded who monitored cooling or what happened when the 10:00 p.m. reading exceeded the limit.
1. Evaluate the cooling process against common food-code limits and identify the points where the process failed.
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A common food-code cooling standard is 57°C to 21°C within 2 hours, then 21°C to 5°C within 4 more hours, for a total of 6 hours. The stew was cooked at 6:00 p.m. and placed in the cooler at 8:00 p.m., so the first 2 hours were already gone. At 10:00 p.m. - 4 hours after cooking - it was still 32°C, well above 21°C. The first stage had failed.
At 8:00 a.m. the stew was 12°C, far above 5°C and about 14 hours after cooking. The second stage had also failed. Deep, tightly covered pans insulate the center of the product, and covering traps heat. The log recorded only the final morning temperature, so no one could take corrective action at the 2-hour or 6-hour marks. The chef’s plan to boil at service does not fix the cooling failure because reheating does not undo the time the food spent in the danger zone.
2. What corrective action is required for the stew now, and can it be saved?
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The stew should not be served. Reheating to 65°C for 20 minutes is not a remedy for a long danger-zone excursion. Bacteria may have grown and produced heat-stable toxins, such as the emetic toxin of Bacillus cereus or staphylococcal toxin, which reheating does not destroy. The record shows a failure at 10:00 p.m. and a temperature of 12°C at 8:00 a.m., with no documented limit met in between.
Because the product cannot be shown to have stayed within cooling limits, treat it as adulterated and discard it. Clean and sanitize the pans, kettle, and thermometer probe afterward. If a regulator permits salvage, it would require a validated process and complete time–temperature records showing the product never exceeded the allowed accumulation; those records do not exist here. The corrective action should also state who made the discard decision, when, and why.
3. Redesign the cooling operation and monitoring so the same failure is caught and corrected next time.
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The kitchen should cool in shallow pans no more than 5 cm deep, or divide the stew into smaller portions, and use an ice bath with stirring or a blast chiller. Pans can be left loosely uncovered in the cooler until the surface reaches 21°C, then covered to prevent contamination. The key is to increase surface area and remove heat quickly.
Monitoring should record the start time, 2-hour temperature, and 6-hour temperature, with a named person responsible and a corrective action already written into the log. If the 2-hour reading is above 21°C, the supervisor must act immediately - add ice, stir, divide, or discard - rather than waiting until morning. Verification should include a supervisor’s daily review of logs and thermometer calibration checks. Training should explain why boiling later does not rescue a cooling failure.