French Chocolate Pie
["1/2 c. butter", "3/4 c. sugar", "2 sq. cooled melted unsweetened chocolate", "2 eggs", "2 c. thawed Cool Whip", "9-inch pie shell, cooled"]
["Cream butter with sugar.", "Stir in chocolate.", "Add eggs, one at a time, beating 5 minutes after each addition at high speed.", "Fold in Cool Whip.", "Pour into a cooled 9-inch pie shell.", "Chill until firm, about 2 hours."]
["butter", "sugar", "chocolate", "eggs", "pie shell"]