French Silk Chocolate Pie
["1 1/2 sticks margarine or butter (soft)", "1 1/2 oz. bitter chocolate", "3/4 c. sugar", "2 eggs (unbeaten)", "1 tsp. vanilla", "1 (8-inch) pie shell, baked or graham cracker", "Cool Whip"]
["Melt chocolate and set aside to cool.", "Using electric mixer at medium speed to cream butter, add sugar gradually.", "Blend chocolate in.", "Add vanilla.", "Mix well, then add eggs one at a time, beating 5 minutes after each egg.", "Pour into pie shell and chill.", "Top with Cool Whip and chocolate shavings, if desired."]
["margarine", "bitter chocolate", "sugar", "eggs", "vanilla", "pie shell"]