Brownies, like many baked goods, have a relatively low moisture content, which helps extend their shelf life compared to more perishable items. If brownies are not refrigerated, they will typically remain safe to eat for a few days, especially if stored in an airtight container at room temperature.
The specific shelf life of brownies depends on various factors, including the ingredients used, how they were prepared, and the ambient temperature and humidity where they are stored. In general, homemade brownies without any perishable fillings (like cream cheese or fresh fruits) can last 2 to 4 days at room temperature without spoiling.
After this period, the texture and flavor might start to degrade, and the risk of mold growth increases. To extend their freshness, you can refrigerate brownies, which will help to maintain their quality for a longer time, typically around 1 to 2 weeks. If you want to store them for an even longer period, freezing is an excellent option, and they can last for several months in the freezer when properly stored.
To summarize, if you plan to consume the brownies within a few days, you can keep them at room temperature in an airtight container. If you want to keep them for more extended periods, consider refrigerating or freezing them. Always use your best judgment, and if you notice any signs of spoilage, such as mold growth or an off smell, it's best to discard them.