1/4 c (1/2 stick) unsalted butter, cubed
2 tsp vanilla extract
powdered sugar, as needed
6 Egg yolks, beaten
2/3 c caster sugar, or superfine sugar
1/3 c all-purpose flour
1 (16 ounces) package of store-bought puff pastry, 2 sheets, thawed
1 1/2 c heavy cream
1 1/2 c whole milk
1/2 c water
Prepare the oven and preheat to 175 degrees C or 350 degrees F.
Line with parchment paper into two baking sheets.
Roll out the puff pastry sheets, then put them onto the prepared baking sheets.
Prick the dough with a fork. Make sure not to pierce the bottom of the dough.