Leaving pancakes out overnight at room temperature is generally not recommended due to the risk of bacterial growth and foodborne illnesses. Bacteria can multiply rapidly in perishable foods like pancakes, especially when they are left at room temperature for an extended period.
While microwaving the pancakes can help kill some bacteria, it may not eliminate all of them, and it may not fully restore the quality of the pancakes. Microwaving may also result in uneven heating, making it difficult to ensure that the entire pancake reaches a safe temperature.
To ensure food safety, it is generally advised to follow the "2-hour rule" for perishable foods. According to this rule, perishable foods should not be left at room temperature for more than 2 hours. If the pancakes were left out overnight, it is safer to discard them to avoid the risk of foodborne illness.
It's always best to prioritize your health and safety by properly storing and consuming perishable foods within the recommended timeframes.