Which of the following has a total shelf life of 2 days?

The correct answer is buttermilk batter, which is typically used in recipes for frying and has a shorter shelf life than cooked or pre-cooked items. Buttermilk batter contains perishable ingredients such as buttermilk and eggs, making it prone to bacterial growth shortly after preparation. As a result, food safety guidelines recommend that it should be used or discarded within two days to prevent spoilage.

In contrast, other items on the list, such as French fries and fried chicken breasts, generally have longer shelf lives due to their cooked nature. Once cooked, these items can last longer when stored properly in refrigeration. Onion rings, like French fries, are also cooked products and tend to have an extended shelf life beyond two days when stored correctly. Thus, buttermilk batter stands out as the item with a total shelf life of only two days, emphasizing the importance of monitoring shelf life for food safety.