Prepare pastry and place pan into freezer while you prepare the filling.
Preheat oven to 350 degrees.
In a small saucepan over medium-low heat, melt butter and add instant coffee. Stir in the chopped chocolate and continue to stir until chocolate is melted and the mixture is smooth. Remove from heat, set aside, and allow to cool.
In another bowl, beat eggs and sugars until slightly frothy. Add cooled chocolate and vanilla. Stir in flour and cinnamon. Pour mixture into prepared pie shell.
Bake at 350 degrees for 25 minutes or until filling sets. Allow pie to cool to room temperature (the pie will cut better) and serve with whipped cream and a dusting of orange zest.
Whipped Cream with Orange Essence
Whisk together flour, sugar, and salt. Cut butter into flour mixture. Add cold water to make a shaggy dough. Form into a disk and chill for at least 30 minutes. Roll and fit into 9" pie pan. Freeze pie shell before adding filling.