Prepare the puff pastry: Roll out one sheet of puff pastry and spread evenly with nut chocolate spread.
Layer the pastry: Place the second sheet on top and press lightly.
Cut into triangles: Divide the layered pastry into 3 equal parts, then cut each part into triangles.
Shape the croissants: Roll each triangle from the long side to the tip to form a croissant. Place them on Broil King baking paper.
Glaze: Whisk together the egg and milk, then brush over each croissant for a golden, glossy finish.
Bake: Preheat a pizza stone in the oven. Bake at 200°C (390°F) for 25 minutes until puffed and golden.
Serve: Enjoy warm for a gooey chocolate center and flaky, buttery layers.