Microwave for 30 seconds on high. If needed, keep microwaving in 15-second intervals, and keep checking on the muffin.
Air Fryer Method
Start by preheating your air fryer to around 300°F (150°C). This temperature ensures that your muffin warms evenly without burning.
While the air fryer is preheating, take your frozen muffin out of the freezer. There’s no need to thaw it; the air fryer works perfectly with frozen muffins.
To prevent the muffin from drying out or getting too brown on top, wrap it lightly in aluminum foil. This step also helps in heating the muffin evenly.
Place the wrapped muffin in the air fryer basket. Set the timer for about 10-15 minutes. The exact time might vary depending on your air fryer model and the size of the muffin.
After about 10 minutes, check the muffin. You’re looking for it to be heated all the way through. If it’s not quite there yet, give it a few more minutes.
Once your muffin is warm and toasty, carefully remove it from the air fryer (it'll be hot!). Unwrap it from the foil, let it cool for a minute or two, and enjoy your perfectly reheated muffin!