Start with room temperature puff pastry and layout on a flat surface.
Use a pizza cutter or sharp knife to cut the piece 3 x 4.
Preheat your air fryer to 350 degrees F for 5 minutes, air fryer setting, and then add the puff pastry (leave space between them) and set the time for 4 minutes, air fryer setting.
Carefully brush the hot puff pastry with melted butter, then toss or sprinkle powdered sugar.