01 -
Preheat oven to 190°C. Roll out the puff pastry sheets slightly to fit a 23×33 cm baking pan. Place each sheet on a lined baking sheet, prick with a fork, and bake for 15–18 minutes or 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. Slowly add warm milk to the egg mixture, whisking constantly to prevent curdling. Return the mixture to the saucepan and cook over medium heat, stirring constantly, until thickened (about 5–7 minutes). Remove from heat and stir in vanilla extract. Let the custard cool to room temperature.
03 -
Place one baked puff pastry sheet in a 23×33 cm pan. Spread the cooled custard evenly over the pastry. Top with the second puff pastry sheet, pressing gently.
04 -
Refrigerate for at least 4 hours (or overnight) to set. Before serving, dust the top with powdered sugar. Slice into squares and enjoy!