Cooking for a Crowd.
Forty guests, eight portions to a tray, two trays to an oven: five trays, three rounds, and the first tray has to stay hot for eighty minutes.
A domestic kitchen scales poorly. Ingredients multiply easily (XXIII.3), but an oven holds two or three trays, a hob four pans, a fridge a few large containers. So feeding a crowd is cooking in rounds, and the question becomes what happens to the food from the early rounds. It must be held hot — above about 60 °C, where pathogens cannot grow (the US Food Code says 57 °C, UK guidance 63 °C) — or cooled quickly and reheated to 74 °C (XII.7, XII.11). Anything between is the danger zone (XII.3), and large quantities spend long in it if left to cool on the side.
Holding has its own costs. Crisp things go soft, roasts dry out, green vegetables dull, rice and pasta overcook. So crowd menus favour dishes that hold or improve: braises, stews, curries and chillies, which can be made a day ahead, chilled and reheated (XVI.4); baked pasta and gratins (XV.10); roasts carved at the last minute; salads and cold dishes dressed at the table. The oven's rounds then set the timetable. The workshop counts trays.
Below: for the number of guests you choose, the trays needed (eight portions a tray), the oven rounds with the ovens you choose (two trays an oven, 40 minutes a round), and how long the first tray must be held hot while the last one cooks.
- Plan cooking in rounds.
- Hold food hot safely or cool and reheat it.
- Choose dishes that hold well.
- Find the bottleneck in a crowd menu.
Let the oven set the timetable
For forty guests with one oven, five trays take three rounds, and the first tray waits about 80 minutes in a hot holding oven or chafing dish; with two ovens, 40. For eighty with one oven, the oven alone is busy about 200 minutes. That is why caterers cook ahead: a braise or curry made the day before, cooled fast in shallow containers and reheated to 74 °C in the oven while the rest is finished, turns the oven from a bottleneck into a reheating cabinet.
Crowd rules: choose a menu with no more than one dish that must be cooked at the last minute; make what you can the day before; cool large batches quickly — divide into shallow containers, stir over ice (XII.7); reheat thoroughly (XII.11); hold hot food covered, above 60 °C, checking with a thermometer, and cold food below 5 °C, on ice if out for long; set out small batches and replace them rather than leaving one big dish out for hours (the two-hour rule, XII.3). Write the plan backwards from serving, as in XXIII.5, with the oven as the resource to watch.
For your next gathering, count trays, oven rounds and burners before choosing the menu; if the first round would wait more than 40 minutes, swap one oven dish for a braise made the day before.
Terms
- Hot holding
- Keeping cooked food above about 60 °C until served.
- Rounds
- Successive batches through limited equipment.
- Chafing dish
- A dish over hot water or a burner for holding food hot.
- Cook-chill
- Cooking ahead, chilling fast, reheating to 74 °C.
Sources
- U.S. Food and Drug Administration, Food Code 2022 (sections 3-401.11, 3-403.11, 3-501.14, 3-501.16, 3-402.11 and the definition of time/temperature control for safety food).
- USDA FSIS, "Leftovers and Food Safety": refrigerate within two hours, eat within 3–4 days or freeze; reheat to 74 °C (165 °F). FDA Food Code 2022, 3-403.11: food reheated for hot holding reaches 74 °C within two hours.
- A teaching value chosen for the course: the right order of magnitude and shape, not a measurement of a particular food.