preheat the oven at 325 degrees
prebake the pie crust: dust the bottom of the pie pan with a pinch of flour
ease the pie crust into the pan, press the crust into the sides and pinch or crimp around the top of the pie pan
crumple a piece of parchment paper, lay it in the pie crust, cover with pie weights or dry beans and bake for 15 minutes
after 10 minutes remove the paper and the weights and bake for another 10 minutes
meanwhile make the pie: In a medium bowl add flour, sugar, salt and cocoa together.
Whisk to combine
Now add the milk to the flour mixture
Stir to combine
In a small bowl beat the eggs and add to the cocoa mixture
Stir to combine
Add the vanilla and butter to the cocoa mixture
Use a hand mixer and beat it until the mixture gets smooth
Now, pour this batter into the pie shell
Bake for 50 - 60 minutes or until the center is no longer runny but still has jiggle
Cool completely
Begin the white chocolate ganache while the pie is cooling
Add white chocolate wafers to a medium sized bowl and set aside
In a small pot, heat cream over low heat, stirring occasionally
Heat until just before boiling, bubbles will start to appear in the cream at the edge of the pot
Remove the cream from the heat and pour over the chocolate wafers
Let stand for 2-3 minutes and then stir until completely smooth
Let the white chocolate ganache cool to room temperature, this will take sometime, do not let it get completely solid
When the pie is cool pour the ganache on top of the pie
Set to the side to cool completely