No, it is not safe to cover food with parchment paper in the microwave. Parchment paper is made from paper that is treated with a thin layer of silicone, which can catch fire when exposed to high heat. Microwaves generate heat by emitting microwave radiation that is absorbed by the water molecules in the food, causing them to vibrate and produce heat. When the parchment paper is exposed to this radiation, it can become hot enough to ignite or cause a fire.
If you need to cover food in the microwave, it is recommended to use microwave-safe materials such as microwave-safe plastic wrap, microwave-safe lids, or microwave-safe glass containers with lids. Always check the packaging of any materials you plan to use in the microwave to ensure they are labeled as microwave-safe.
Additionally, when using any type of covering in the microwave, it's important to leave a vent or opening to allow steam to escape. This helps prevent pressure from building up inside the container and reduces the risk of food splattering or the container bursting open.