Preheat the air fryer. Set it to 350°F (175°C) for a few minutes.
A hot basket helps the chips crisp faster.
Mix the cinnamon sugar. In a small bowl, combine sugar, cinnamon, and a pinch of salt. Taste and adjust the cinnamon to your liking.
Prep the tortillas. Stack and cut tortillas into wedges—quarters for large tortillas, or sixths for smaller ones. Aim for even pieces so they cook at the same rate.
Brush with butter. Lightly brush both sides of each wedge with melted butter.
You want a thin coat, not a soak.
Coat with cinnamon sugar. Sprinkle the mixture generously over both sides. Press lightly so it adheres. Shake off excess.
Arrange in the basket. Spray the air fryer basket.
Place wedges in a single layer with minimal overlap. Work in batches to avoid crowding.
Air fry. Cook for 4–6 minutes, flipping halfway. Start checking at 4 minutes. They should be golden and crisp but not dark brown.
Cool briefly. Transfer to a wire rack for 2–3 minutes.
They crisp even more as they cool.
Taste and finish. If you want extra sparkle, dust with a little more cinnamon sugar while warm. Repeat with remaining wedges.
Serve. Enjoy warm or at room temperature with your favorite dips.