A food worker cools a batch of chicken using the two-stage cooling method. what is the maximum amount of time the chicken should cool from 135°f to 70°f (57°c to 21°c)? • a. 2 hours • b. 4 hours • c. 6 hours
The Correct Answer and Explanation is :
The correct answer is a. 2 hours.
In food safety, particularly for meats such as chicken, it is essential to follow proper cooling methods to prevent the growth of harmful bacteria. The two-stage cooling method is designed to minimize the time that food spends in the “danger zone” (between 41°F and 135°F), where bacteria can grow rapidly.
Two-Stage Cooling Method:
The two-stage cooling process involves cooling food in two phases:
- First Stage: The food must be cooled from 135°F to 70°F (57°C to 21°C) within two hours.
- Second Stage: After reaching 70°F, the food must then be cooled further from 70°F to 41°F (21°C to 5°C) or lower within an additional four hours.
This method ensures that the food cools quickly enough to prevent the growth of pathogens such as Salmonella and Campylobacter, which can thrive in the danger zone.
Why 2 Hours for the First Stage?
The first stage of cooling (from 135°F to 70°F) should occur within two hours to minimize the time the food spends in the dangerous temperature range (above 70°F and below 135°F). After 70°F, bacteria grow at a much slower rate, so the remaining cooling time can be extended to a total of six hours for the entire process (2 hours for the first stage and 4 hours for the second stage).
Potential Risks of Not Following This Rule:
If the chicken or any other food takes longer than the specified time to reach 70°F, the risk of bacterial growth increases. The USDA Food Safety and Inspection Service (FSIS) recommends strict adherence to these guidelines to ensure that foodborne illnesses are avoided, especially in commercial food operations.
Therefore, the maximum allowable time for cooling chicken from 135°F to 70°F is two hours, as per the two-stage cooling method.