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["Dust a cutting board with cake flour (not listed).", "Place the frozen puff pastry and defrost at room temperature.", "Roll the pastry out slightly with a rolling pin.", "Cut each pastry into half, then into 4 even pieces.", "Break the chocolate bar into bite size pieces (break along the lines between squares as much as possible).", "Preheat the oven to 200C.", "Lightly brush the surface with a beaten egg.", "Place the chocolate pieces in the middle of the pastry.", "Lay another pastry on top.", "Press the edges firmly together with a chopstick.", "Brush the tops with the beaten egg for glazing.", "Poke several holes (about 10 holes) in the pastry with a bamboo skewer.", "Repeat Step 5~10 to make 8 pies.", "Line a baking tray with parchment paper and place the pies from Step 11.", "First, bake for 10 minutes at 200C.", "Then lower the temperature to 180C and bake for 15 minutes.", "Take the pies out of the oven, and let cool.", "And they are done.", "When the pies have cooled down slightly, drizzle melted chocolate (not listed) and chill in the fridge for a while if you like.", "To use up the leftover egg and chocolate... ""Easy Chocolate Pudding""