Preheat your air fryer to 300° F. My air fryer typically takes 2-3 minutes to preheat, but follow your manufacturer instructions, as it does vary depending on what type and size of air fryer you're using.
Butter your toast and add any additional toppings (optional) that you are wanting to cook with the bread.
Set the timer or leave the toast in the air fryer for about 3 minutes. Check the toast to see if it's your desired level of baked, and if necessary add additional time.