1/2 c. butter, cut in 8 equal parts
1 (1 oz.) square unsweetened chocolate, melted and cooled
1 tsp. vanilla
1 (8 inch) baked pastry shell
3/4 c. sugar
2 lg. eggs
Whipped cream

In a small mixing bowl, cream butter and sugar. Beat in chocolate and vanilla until blended. Add eggs, one at a time, beating with electric mixer at medium speed for 5 minutes after each addition. Turn into pastry shell. Chill, garnish with whipped cream.