1 baked pie shell
1/2 c. butter
3/4 c. sugar
2 sq. unsweetened chocolate
2 eggs
2 c. Cool Whip

Cream together butter and sugar. Stir in cooled, melted chocolate. Add eggs one at a time. Beat 5 minutes with each at high speed. Fold in Cool Whip. Pour into pie shell. Chill 2 hours. Use remaining Cool Whip on top.