01 -
Mix the sugar, cornstarch, and salt in a bowl. Add the egg yolks and whisk until the color lightens. Put aside for later.
02 -
Pour the milk and vanilla into a pot set on medium heat. Stir occasionally and warm until it begins to bubble softly around the edge. Don’t let it boil.
03 -
Take the pot off the heat. Slowly drizzle warm milk into the egg mixture bit by bit, stirring constantly. This prevents the yolks from overcooking. Keep adding milk until everything is combined and silky.
04 -
Return the mixture to the pot and cook over medium-low heat. Stir often until it thickens. Remove from heat and mix in butter until fully melted and blended.
05 -
Scoop the custard into a bowl. Cover it up and refrigerate until chilled.
06 -
Set the oven temperature to 400°F. Use a small bowl to whisk the egg and milk together for the egg wash. Get your baking tray ready with some parchment paper.
07 -
Slice each sheet into 4 squares to make a total of 8. Feel free to trim them smaller if you'd like. Spread a little egg wash on each square, fold them over, and pinch the edges to keep them closed. Brush the tops with more egg wash.
08 -
Bake for 20-25 minutes until all sides are evenly golden. Remove from the oven and set on a rack to cool down to room temperature.
09 -
Slice the pastries open and spoon in some custard. Layer in the strawberries, close it up, and sprinkle powdered sugar on top before serving.