Preheat the oven to 400°F
Follow thawing instructions of your desired puff pastry. Once ready, lightly flour and sandwich half of the pastry (198g) between two pieces of parchment paper. Using a rolling pin, roll the dough from the center outward, rotating the dough a quarter turn each roll until it is around 1/8th of an inch in thickness.
Using a 9 inch cake pan as a guide, cut out a 9 inch circle and place in the fridge. Take the scraps and add to the other half of pastry. Repeat the process, but when cutting out the circle add an additional inch to the perimeter. Place in the fridge.
In a small bowl, add egg yolks and whisk with a fork until smooth.
Take out apple mixture and pastry from the fridge. Take a cookie sheet and place the smallest pastry circle down, leaving it backed on the parchment paper. Spoon the apple mixture on to the center of the pastry forming a 6.5 inch mound.
Using a pastry brush dipped in egg yolk, paint along the edges. Take the second pastry circle (the large one) and place over top. Using your fingers, gently form the dough over the apple mixture and lightly press the edges together where the yokes were brushed on.
Using your thumb as a guide, scallop the edges of the pastry by using a knife to outline your thumb. Once done, use your knife to puncture a small slit on top of the pastry.
At the base of each scallop, gently drag your knife to the center to score the pasty. It should only scratch the surface of the pastry (not cut all the way through). Lastly, brush the entire pithivier with the egg yolks and place in the freezer for 5 mins.
Place in the oven and bake for 50-60 mins until it becomes a dark golden colour. Refrain from opening the oven door until at the 45min mark, otherwise you risk the pastry deflating.
Let cool for 20-30 mins before serving with whipped cream.
Enjoy!