Preheat oven to 350 degrees. Crush the graham crackers in a food processor or resealable bag. Add them to a bowl and pour in melted butter and sugar. Stir to combine. Press into a deep-dish pie pan and bake for 5 minutes. Set aside to cool.
Chocolate Filling:
In a microwave-safe bowl, cook the chocolate in the microwave at 50% power for about 1 minute. If it is isn't fully melted, put it back in for 30 second increments. Set aside to cool.
In a large mixing bowl, beat the softened butter (NOT melted or hot) and sugar for at least 4-5 minutes, scraping the sides of the bowl often.
Add the chocolate (make sure it isn't hot) and beat for about 15 seconds. Stir in vanilla.
Add eggs one at a time, beating for 5 minutes after each addition. This will take 20 minutes total. Pour into cooled pie crust. Chill for at least 2 hours in the refrigerator.
Whipped Cream:
In a chilled bowl, beat the heavy cream and sugar for about 4-5 minutes or until stiff peaks form. Cover the pie with a thick layer of whipped cream. Top with chocolate curls or shavings. Serve chilled.