Prepare the bread: Trim the crusts off the sandwich bread slices so that each piece can be easily rolled. Using a rolling pin, gently flatten each slice into a thin rectangle. This makes rolling easier and helps the cheese melt evenly.
Assemble the roll-ups: Place a slice of cheese in the center of each flattened bread slice. Sprinkle with garlic powder or paprika if using, then carefully roll the bread tightly around the cheese. Make sure the seam is tucked underneath to prevent cheese from leaking during cooking.
Butter the roll-ups: Lightly spread softened butter on the outside of each roll-up, coating all sides. This will create a golden, crispy exterior once air fried.
Preheat the air fryer: Set your air fryer to 370°F (188°C) and let it preheat for 2–3 minutes. Preheating ensures the roll-ups cook evenly and get a nice crisp on the outside.
Cook the roll-ups: Place the roll-ups seam-side down in the air fryer basket, leaving a little space between each one. Air fry for 8–10 minutes, turning halfway through, until the bread is golden brown and the cheese inside is melted and gooey.
Serve immediately: Remove the roll-ups carefully from the air fryer and let them cool for a minute. Serve warm with your favorite dipping sauce on the side. Enjoy the melty, crispy, cheesy goodness with every bite!