Which dairy product is considered a TCS food?

Sour cream is classified as a Time/Temperature Control for Safety (TCS) food because it is a perishable dairy product that can support the growth of harmful bacteria if not stored properly. TCS foods are those that require specific temperature controls to prevent foodborne illness. Sour cream typically needs to be kept refrigerated and must be held at safe temperatures to minimize the risk of microbial growth.

In contrast, frozen yogurt, while also a dairy product, is usually consumed at a lower temperature and is less prone to bacterial growth when frozen. Butter, being a high-fat dairy product, has a lower moisture content and can be safely stored at room temperature for certain periods depending on the type. Parmesan cheese, particularly when aged, has a lower moisture content and can be stored safely without refrigeration for a longer time, making it less susceptible to spoilage compared to sour cream. Therefore, sour cream's properties and storage requirements identify it as a TCS food.