Step 1

Step 1: Lay one sheet of puff pastry on a clean surface and arrange the squares of chocolate on top.

Step 2

Step 2: Sprinkle hazelnuts on top of each chocolate square.

Step 3

Step 3: Place another sheet of puff pastry on top and pinch the edges to seal it with the other pastry.

Step 4

Step 4: Cut the puff pastry into squares and place them on a parchment-lined baking sheet.

Step 5

Step 5: Brush them with egg wash. Bake in a 180°C (356°F) oven for 20 minutes.

Step 6

Step 6: Serve dusted with icing sugar.