# Step-by-Step Directions:
01 - Preheat the air fryer to 350°F (175°C).
02 - Slice each croissant in half horizontally without cutting completely through, forming a hinge.
03 - Spread approximately 2 tablespoons of Nutella inside each croissant, then gently press the halves together.
04 - Place croissants in a single layer inside the air fryer basket.
05 - Air fry for 4 to 5 minutes until croissants are golden and Nutella becomes melty.
06 - Carefully remove croissants and, if desired, top with chopped hazelnuts or dust with powdered sugar. Serve warm.