Lay tortilla flat, fold in half, open back up, then fold in half opposite direction, and open up again. The fold marks create a center point and 4 equal quadrants. Cut along one line going from the center of the tortilla to the right edge.
On the left side of the cut, spread Nutella to taste. On the right side, spread cookie butter to taste.
Add mini marshmallows to the side with the Nutella.
Take the Nutella side and fold its first quadrant on top of the other quadrant of the Nutella. Then fold the Nutella side over the cookie butter quadrant. Fold it one more time over the cookie butter. You should end up with a quarter sized tortilla, with cookie butter on the first inside layer and nutella and marshallows in the middle layer.
Butter both sides of the tortilla foldover. Sprinkle cinnamon sugar on both sides. Place in the air fryer basket (I placed mine on parchment paper to make clean up easier, this is optional).
Air fry at 380 °F for 4-5 minutes, flipping at the halfway point, or until the outside is golden and crunchy to your liking.