French Silk Pie

1 cup sugar
3/4 cup butter
3 oz. unsweetened chocolate
1 1/2 tsp. vanilla
3 eggs
1 chocolate cookie pie shell
1/2 cup whipping cream
2 Tbs creme de cacao

Beat sugar and butter until fluffy.  Sitr in chocolate and vanilla.  Add the eggs, beating well.  Put chocolate mixture into pie shell. Cover and shipp 4-24 hours. 

Beat whipping cream and creme de cacao until soft peaks form.  Garnish pie with whipped cream.