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Custard Square with Homemade Puff Pastry

Flaky pastry layers and silky vanilla custard come together in this irresistible bakery-style dessert. Once you try this homemade custard square, you will never look at store-bought slices the same way.
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Ingredients
  

2 cups all-purpose flour

1 tsp salt

1 cup unsalted butter, cold and cubed

1/2 cup cold water

1 tsp lemon juice

2 cups whole milk

1/2 cup granulated sugar

4 egg yolks

1/4 cup cornstarch

2 tbsp unsalted butter

2 tsp vanilla extract

1/2 cup powdered sugar

Instructions
 

  • In a bowl, combine flour and salt. Add cold butter cubes and mix lightly.
    Add water and lemon juice and mix until dough forms.
    Roll the dough into a rectangle and fold into thirds. Repeat the rolling and folding process several times.
    Chill the dough if it becomes soft during folding.
    Divide dough into two portions and roll each into a thin rectangle.
    Place pastry sheets on baking trays and prick with a fork.
    Bake at 400°F (200°C) for 18–20 minutes until golden.
    Warm milk in a saucepan.
    Whisk egg yolks, sugar, cornstarch, and salt in a bowl.
    Slowly add warm milk while whisking.
    Return mixture to the saucepan and cook while whisking until thick.
    Stir in butter and vanilla extract.
    Place one baked pastry sheet in a lined pan.
    Spread custard evenly over the pastry layer.
    Place the second pastry sheet on top.
    Chill in the refrigerator for at least 3 hours.
    Dust with powdered sugar and slice into squares before serving.