Chill the Nutella balls

• Scoop the Nutella into small balls on a lined tray.
• Freeze until firm so they hold their shape.

Wrap in pastry

• Cut the puff pastry into squares.
• Place a Nutella ball in the centre of each square and fold the corners over, pinching the seams to seal completely.
• Brush the tops with beaten egg.

Bake

• Arrange the bombs seam-side down on the baking tray.
• Bake at 200 °C until puffed and golden.

Coat and serve

• Roll the warm bombs in cinnamon sugar.
• Serve immediately while the filling is molten.