Preheat the air fryer to 400 degrees.
Add the panko and melted butter in a bowl. Mix until panko is coated in butter.
Add a small pan to the air fryer. Pour the panko into it. Cook for 1 minute.
Stir and cook for an additional 2 minutes in 30-second increments. Make sure to stir after every 30 seconds. Panko will be a golden brown color.
Pour panko into an airtight container and use it with your favorite recipe. Enjoy!