Which cooling method correctly brings food from 135°F to safe temperatures?

• A. Move from 135°F to 70°F within 2 hours, then 70°F to 41°F within the next 4 hours using shallow pans or ice baths.
• B. Move from 135°F to 41°F in 6 hours using a refrigerator.
• C. Move from 135°F to 70°F in 6 hours using deep pans.
• D. Move from 135°F to 60°F in 4 hours and then to 40°F in 6 hours.

Answer: (A)

Cooling hot foods safely relies on moving them out of the danger zone quickly and reaching a safe temperature within a strict time frame. The danger zone, where bacteria can grow rapidly, is roughly 41°F to 135°F. The recommended method is a two-stage cooling: first bring the food from 135°F down to 70°F within 2 hours, then from 70°F down to 41°F within the next 4 hours, using ways that maximize heat transfer such as shallow pans or an ice bath. This ensures the total cooling time stays within 6 hours and the food reaches a safe temperature.

Using shallow pans or an ice bath speeds heat loss because more surface area contacts cold surroundings, so the food cools faster than in deep pans. Relying on a refrigerator for the initial drop is usually too slow to meet the 2-hour 135°F to 70°F target and can leave the food in the danger zone longer. Deep pans slow cooling, and taking too long to reach 41°F means higher risk of bacterial growth.