Which of the following is a TCS food?

A TCS (Time/Temperature Control for Safety) food is one that requires specific time and temperature controls to prevent the growth of microorganisms that can cause foodborne illness. TCS foods are typically those that are moist, contain protein, and have a neutral or slightly acidic pH.

A baked potato qualifies as a TCS food because it is moist, rich in carbohydrates, and when cooked, retains heat, creating an environment conducive to bacterial growth if it is not handled safely. If left at room temperature after cooking, the potato can harbor harmful bacteria, making it crucial to keep it at the appropriate temperatures or consume it promptly.

In contrast, bread does not contain sufficient moisture to support rapid bacterial growth and is generally safe to store at room temperature. Mayonnaise, while it may contain eggs, is usually acidified (commercial mayonnaise typically has a pH level that inhibits bacterial growth), making it less of a TCS food in a properly sealed container. Chocolate has low moisture content and is considered a non-TCS food because it doesn't support pathogen growth.