French Silk Chocolate Pie
["1 stick butter, softened", "3/4 c. sugar", "4 Tbsp. cocoa", "1 tsp. vanilla", "3 medium eggs", "1 (9-inch) baked pie shell", "whipped cream or Cool Whip"]
["Mix butter, sugar, cocoa and vanilla; beat for 5 minutes scraping from sides frequently.", "Add eggs, one at a time, beating 5 minutes after each addition.", "Pour into pie shell and chill. Cover with whipped cream or Cool Whip and garnish with shaved chocolate."]
["butter", "sugar", "cocoa", "vanilla", "eggs", "shell", "whipped cream"]