Step 1

Lay the bread slices on a cutting board or work surface. Spread 1 tablespoon mayonnaise or soften butter over each slice. Flip the slices over. Top 2 slices with 2 ounces cheese each. Cover each with the other 2 slices of bread, making sure the mayonnaise or buttered sides are on the outside.

Step 2

Place both sandwiches in a 6-quart air fryer. Cook at 375 degrees F until the tops are golden brown, about 4 minutes (see Cook’s Note). Flip the sandwiches and continue to cook until golden brown all over and the cheese is completely melted, 2 to 4 minutes more. Cut each sandwich in half and serve immediately.