Step 1: Preheat Your Oven - Begin by preheating your oven to 400°F (200°C).
Step 2: Prepare the Puff Pastry - Thaw the puff pastry and roll it out on a lightly floured surface.
Step 3: Make the Chocolate Filling - Combine chocolate and heavy cream in a mixing bowl until melted and smooth.
Step 4: Cut the Pastry - Cut the puff pastry into uniform squares, about 4x4 inches.
Step 5: Fill the Pastry - Place a tablespoon of chocolate filling in the center of each square.
Step 6: Seal the Turnovers - Fold the pastry over to form a triangle and press edges to seal.
Step 7: Brush with Egg Wash - Mix egg and water, then brush over the tops of turnovers.
Step 8: Bake - Line your baking sheet with parchment and bake for 15-20 minutes until golden brown.
Step 9: Cool and Serve - Let the turnovers cool on a wire rack and serve warm.