Blend together the butter, cream cheese and sugar in a stand mixer with the paddle attachment until completely blended together.

Mix in flour and salt until just combined. Form dough into a flat cylinder, wrap in plastic and chill at least an hour or overnight.

Preheat oven to 375. Roll out dough and line a 9" pie pan with the crust crimping the edges, chill for at least 30 mins while the oven preheats.

When ready to bake, place a sheet of parchment in the unbaked crust and use pie weight or dry beans to weigh it down and help hold it's shape. Bake until golden brown, you may need to remove the beans part way through cooking so that the bottom can brown. Set aside to cool.

Whip the cream from the filling portion by hand with a whisk or with the whisk attachment on a stand mixer until medium - stiff peaks form. Set aside in the fridge.

Melt the chocolate over a double boiler or in the microwave until just melted. Set aside to cool at room temperature.

Whisk together the eggs and half the sugar in a metal bowl (preferably a stand mixer bowl) set over a pot of simmering water. Do not let the water surface touch the bottom of the bowl and whisk continuously until the mixture reaches 160 degrees. This may take about 10 minutes. Once it comes to temperature take the bowl to the mixer and with the whisk attachment whip until cooled to about body temperature. At this point we want to slowly add the melted chocolate whisking just until completely combined. Set aside.

In another bowl cream together the butter, vanilla and the remining sugar until light and fluffy, as if you were making cookies. This should take at least 2 minutes. With the mixer on low add in the cooled chocolate and egg mixture. Once it is all added whip until completely combined. Now, using a rubber spatula fold the whipped cream that we placed in the fridge earlier into this mixture.

Spread the filling into the cooled pie crust and cover wrap tightly with plastic wrap. Chill the pie in the fridge for at least 2 hours or overnight.

Whip the cream, sugar, salt and vanilla until medium peaks form and spread over the top of the chilled pie filling. For extra decoration you may also want to shave some chocolate curls on top form a bar of chocolate using a vegetable peeler. Dig in, you earned it.