Forty Gallons of Chili: A Cooling Failure
A caterer cooks 40 gallons of beef chili at 3 p.m. for a Saturday event. At 5 p.m. the chili is 168°F; it is poured into six 6-inch-deep stainless pans, covered, and stacked on the top shelf of a 38°F walk-in. At 7 p.m. the top pan reads 118°F and the bottom pan 136°F. At 9 p.m. the top pan is 78°F and the bottom is 110°F. The cook leaves at 10 p.m. At 6 a.m. Sunday the pans read 46°F to 52°F. The event is at noon. The caterer plans to reheat the chili to 165°F in a steam kettle and hold it at 140°F.
1. Evaluate the cooling against the standard two-stage cooling requirement. Show the arithmetic.
Read the worked answer
Standard: 135°F to 70°F within 2 hours, then 70°F to 41°F within 4 more hours (6 hours total).
Timeline:
- 5:00 p.m. - 168°F. Start of cooling. Stage 1 deadline: 7:00 p.m. at ≤70°F.
- 7:00 p.m. - top 118°F, bottom 136°F. Stage 1 failed by 48°F to 66°F.
- 9:00 p.m. - top 78°F, bottom 110°F. Still not at 70°F after 4 hours. Failed again.
- 6:00 a.m. - 46°F to 52°F. Even the top pan never reached 41°F, and the bottom pan is far off after 13 hours.
Why it failed: 6-inch-deep, covered, stacked pans are insulators. The stack holds heat in the middle and bottom, and the covers trap steam. The walk-in is also being loaded with a large mass of hot food, which raises the ambient temperature and slows everything else in the cooler.
The key judgment: the failure is not marginal. The product sat in the 70°F to 135°F growth range for many hours, far beyond any defensible corrective action.
2. What is the disposition of the chili, and does reheating to 165°F make it safe?
Read the worked answer
Discard the chili. Reheating does not make it safe.
Reasoning: the hazard here is not live vegetative bacteria alone. Prolonged time in the growth range allows toxin production by Staphylococcus aureus and Bacillus cereus, and those toxins are heat-stable. Reheating to 165°F destroys vegetative cells but leaves the toxin intact, so the product can still cause illness. This is the distinction the exam tests: reheating is a corrective step for a product that was held cold correctly and then reheated for service; it is not a rescue for a cooling failure.
What would have changed the answer: if the product had reached 70°F within 2 hours and 41°F within 6 hours, it would be acceptable to reheat to 165°F for hot holding. Here, the failure was obvious by 7 p.m., and the product was still above 70°F at 9 p.m.
Practical step: document the discard, notify the client, and substitute a menu item produced from verified product. Do not taste-test to decide - you cannot detect toxin by taste or smell.
3. Redesign the cooling procedure so this does not recur, and identify the single monitoring point that would have caught it in time.
Read the worked answer
Redesign:
- Portion into shallow pans no more than 2 inches deep, uncovered, and do not stack until the product is below 41°F.
- Use an ice bath, ice wands, or a blast chiller; stir to increase surface contact.
- Split 40 gallons into multiple smaller batches so the cooler is not overwhelmed. Pre-chill the walk-in and avoid loading hot product next to ready-to-eat food.
- Place pans on shelves with airflow, not on the floor or against a wall.
- Write a cooling log with a 2-hour and a 6-hour checkpoint and a named person responsible.
Single monitoring point: the 2-hour check at 70°F. If the product is not at or below 70°F two hours after cooling starts, you still have time to intervene - divide into smaller portions, add ice, or move to a blast chiller. Waiting for the 6-hour check leaves no recovery option. The 7 p.m. reading of 118°F was the moment to act, and it was recorded but not acted on, which is a training and authority failure as much as an equipment failure.