Preheat the air fryer to 350°F (175°C).
Separate the biscuit dough and flatten each piece slightly.
Spoon about 1 teaspoon of Nutella onto the center of each piece of dough.
Pinch the edges of the dough together to seal and roll into a smooth ball.
Place the balls seam-side down in the air fryer basket, ensuring they don’t touch.
Cook for 6-8 minutes or until golden brown.
Brush the warm bombs with melted butter.
In a small bowl, mix sugar and cinnamon. Roll each bomb in the mixture to coat.
Serve warm and enjoy!