Step 1

Spread the mayo and mustard equally on one side of each of the 4 pieces of bread. Sprinkle the two types of cheeses equally on two of the pieces of bread. Top with the other slice (mayo/mustard side down).

Step 2

Butter one side of each sandwich, then place butter side down in the air fryer basket, leaving a little space between the two sandwiches. Butter the top pieces of bread of each sandwich.

Step 3

Set the air fryer to 390°, and cook for 4 minutes. Flip the sandwiches and return to the air fryer for 4 to 6 minutes or until the cheese is melted and the bread is golden and toasted. Wait 1 to 2 minutes, then slice and serve.