Sixty Lunch Boxes, One Domestic Oven
A home baker has been asked to supply 60 chicken-and-rice lunch boxes for a school sports day at 12:30. She has one domestic oven that holds a maximum of two trays at a time, a four-burner hob, a fridge at 4°C, no blast chiller, and two insulated cool boxes. Her kitchen has one sink. She plans to cook chicken thighs in the oven from 08:00, cook rice in a large pot, pack all boxes at 10:30, and transport them in the cool boxes with ice packs at 11:30. The school is 25 minutes away. The forecast is 30°C. She has not cooked for 60 before.
1. Evaluate whether the baker's plan is safe and feasible.
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The plan is not feasible with the stated equipment. Two trays at a time means at least three or four oven batches for 60 chicken thighs, each taking 30–40 minutes, so cooking cannot finish by 10:30 if the chicken is cooked properly and checked. Rice cooked in one large pot will cool very slowly; packing it warm at 10:30 and holding it in cool boxes means it passes through the danger zone and may support Bacillus cereus. Ice packs in a cool box do not reliably cool hot food quickly, especially at 30°C. The single sink also creates a cross-contamination risk between raw chicken, rice and ready-to-eat items. The plan assumes that warm food plus ice packs is safe, but without rapid cooling or hot holding, it is not. The baker should not accept 60 boxes on this plan.
2. Propose a revised plan or explain what she should decline.
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She should decline 60 boxes unless she can borrow a second oven, a blast chiller or a commercial hot-holding unit. A safer revised option is to accept 30 boxes and cook in two or three batches, or to supply a cold rice salad with separately cooked chicken that is rapidly chilled. If she proceeds with 30, she should cook chicken to 75°C, cool it quickly in shallow containers, and keep it at 5°C or below. Rice should be cooked in small batches, spread in shallow trays, cooled within 1 hour, and refrigerated. Pack the boxes cold with ice packs, transport in under 30 minutes, and keep them below 5°C until service. If hot holding is required, she needs equipment that holds food at 63°C or above. The judgement is to match the order to the equipment, not to stretch a domestic kitchen beyond its limits.
3. What are the key control points she must write into a food safety plan for the revised order?
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The plan should name critical control points, not just tasks. For chicken: separate boards, cook to 75°C, check with a probe, and chill rapidly if serving cold. For rice: cook in batches, cool in shallow trays within 1 hour, refrigerate at 5°C or below, and reheat only if a hot service is planned. For cross-contamination: wash hands, clean the single sink between raw and cooked items, and keep raw chicken below ready-to-eat foods in the fridge. For transport: pre-chill cool boxes, use enough ice packs, record the temperature at packing and at delivery, and keep the journey under 30 minutes. Include a time log and a contingency: if any temperature is out of range, discard rather than serve. The plan should also state who is responsible for each check and what evidence is kept.