Chocolate Mousse Pie
["1/4 c. butter", "3/4 c. sugar", "2 oz. semi-sweet chocolate", "2 eggs", "2 c. Cool Whip", "9-inch baked pie shell", "chopped nuts (if desired)"]
["Cream together the butter and sugar until well blended.", "Melt the chocolate. Let cool. Add to butter and sugar.", "Add the eggs, one at a time, beating 5 minutes after each one.", "Fold in the Cool Whip. Spoon into the pie shell.", "Sprinkle with chopped nuts, if desired.", "Top with Cool Whip as if it were meringue. Refrigerate 6 hours before serving."]
["butter", "sugar", "semi-sweet chocolate", "eggs", "shell", "nuts"]