1/2 c. butter
3/4 c. sugar
2 (1 oz.) sq. unsweetened chocolate, melted
1 tsp. vanilla
2 eggs
1 1/2 c. Cool Whip
1 graham cracker pie crust

Beat butter and sugar. Blend in chocolate and vanilla. Beat eggs one at a time. Beat 3 minutes after each egg. Put in graham cracker crust and chill. Before serving, put Cool Whip on top.