The amount of time you can heat up something in a microwave without actually cooking it can vary depending on several factors, including the initial temperature of the food, its size and thickness, the microwave's power level, and the specific food item itself.
In general, microwaving food for short intervals, such as 10-20 seconds at a time, and checking its temperature or consistency between intervals can help prevent overcooking. This allows you to gauge how much additional heating is needed without fully cooking the food.
However, it's important to note that even with short intervals, certain foods can undergo some level of cooking or change in texture, especially if they are highly heat-sensitive. Delicate foods like fruits, vegetables, and some dairy products can become soft or mushy with prolonged heating, even if you're trying to avoid cooking them.
To heat up something in the microwave without cooking it, consider using a lower power setting if available. This allows for more gentle heating and reduces the likelihood of overcooking. Additionally, stirring or turning the food during the heating process can help distribute the heat more evenly and minimize the risk of localized overheating.
If you're uncertain about the appropriate heating time for a particular food item, it's best to err on the side of caution and heat it in short intervals while checking its temperature or consistency regularly.