How long can cooked food be left out before it should be refrigerated?

Cooked food can be safely left out at room temperature for up to 2 hours before it should be refrigerated. This timeframe is based on food safety guidelines that aim to prevent the growth of harmful bacteria. When food is left out, it enters the "danger zone," a temperature range between 40°F and 140°F, where bacteria can multiply rapidly. After 2 hours, the risk of foodborne illness increases significantly, which is why it is crucial to either eat or refrigerate cooked food within this period to ensure safety.

The 2-hour guideline provides a balance between allowing food to cool slightly and minimizing the risk of bacterial growth. In warmer conditions, such as outdoor events when the temperature is above 90°F, this guideline is shortened to 1 hour. Understanding these timeframes helps to promote food safety practices within the food service industry, including establishments like McDonald's, ensuring that the food served to customers is safe for consumption.