1 1/2 sticks butter
3 sq. unsweetened chocolate, melted
1 c. sugar
4 eggs
3 tsp. vanilla
1 prepared graham cracker pie crust

Soften butter and blend well with sugar. Add eggs, one at a time, beating well after each addition. Add melted chocolate; add vanilla. Pour into crust and chill for several hours. Serve with whipped cream.