01 -
Preheat oven to 190°C. Roll out puff pastry sheets to fit a 9x13-inch pan. Place each sheet on a lined baking sheet, prick with a fork, and bake for 15-18 minutes until golden and crispy. Let cool completely.
02 -
In a large saucepan, heat milk over medium heat until warm but not boiling. In a separate bowl, whisk together sugar, flour, and egg yolks until smooth. Gradually add warm milk to the egg mixture, whisking constantly to prevent curdling. Return mixture to saucepan and cook over medium heat, stirring constantly, until thickened (5-7 minutes). Remove from heat and stir in vanilla extract. Allow custard to cool to room temperature.
03 -
Place one baked puff pastry sheet in a 9x13-inch pan. Spread cooled custard evenly over the pastry. Place the second baked puff pastry sheet on top and press gently.
04 -
Refrigerate the assembled dessert for at least 4 hours or overnight to set. Before serving, dust with powdered sugar. Slice into squares and enjoy.