The shelf life of a milkshake outside of the refrigerator depends on several factors, including the ingredients used, the temperature of the surrounding environment, and the length of time it has been left out. Generally, milkshakes are made with perishable ingredients like milk, ice cream, and other dairy products, which can spoil if not handled and stored properly.
In general, it is not recommended to leave a milkshake out of the refrigerator for an extended period, especially in warm temperatures. Bacteria can grow rapidly in milk and dairy products when left at room temperature, potentially leading to foodborne illnesses.
As a general guideline:
If the milkshake contains ice cream and has been sitting at room temperature for more than 2 hours, it is best to discard it.
If the milkshake contains ingredients like fresh milk, yogurt, or other perishable items, it is safer to consume it within 1 to 2 hours of preparation if left unrefrigerated.
To maximize the shelf life and ensure food safety, it's essential to store milkshakes in the refrigerator and consume them promptly. If you're uncertain about the safety of a milkshake that has been left out, it's better to err on the side of caution and dispose of it. Always follow proper food handling and storage guidelines to reduce the risk of foodborne illnesses.