Preheat Oven: Preheat your oven to 425°F. Line two large baking sheets with parchment paper.
Cut Pastry: Unroll the puff pastry sheets. Cut the first sheet into 6 rectangles (or 8 if the sheets are larger). Cut the second sheet into thin strips about ½ inch wide.
2 sheets frozen puff pastry
Warm Nutella: Place 1 tablespoon of Nutella per pie into a microwave-safe bowl. Microwave for 10–20 seconds until smooth and spreadable.
6 –8 tablespoons Nutella
Spread Filling: Spread 1 tablespoon of Nutella onto each rectangle, leaving space around the edges to prevent leaks.
Make Mummy Wraps: Place pastry strips diagonally across each rectangle to look like mummy bandages. Leave space at the top for the eyes.
Seal Edges: Trim any extra dough and press the edges together with a fork to seal.
Brush with Egg Wash: Brush the tops with the beaten egg using a pastry brush.
1 large egg
Bake Mummies: Bake for 12–15 minutes, until golden brown. Let cool for a few minutes, then move to a wire rack. Cool completely before decorating.
Add Eyes: Use a dab of Nutella on a toothpick to attach two candy eyes to each mummy.
12 –16 candy eyes
Dust and Serve: Lightly dust with powdered sugar before serving.
2 –3 tablespoons powdered sugar