How long can you leave hot fudge in warmer before it spoils?

Hot fudge can typically be kept in a warmer at a safe serving temperature (around 140°F or 60°C) for up to 2 to 4 hours without spoiling. However, it's important to monitor the temperature, as temperatures below 140°F can promote bacterial growth. For longer storage, it's best to refrigerate the fudge and reheat it as needed. Always check for any off smells, changes in texture, or mold before serving.