Cheryl's Chocolate Satin Pie

Cream together the butter and sugar until pale yellow and fluffy. Add melted chocolate and mix well. Add eggs, one by one, beating on high speed for FIVE MINUTES PER EGG (using a Kitchenaid type of mixer works best). Make sure all sugar crystals are dissolved; keep beating if necessary. Pour into Oreo pie crust. Chill several hours until firm. Garnish with chocolate shavings if desired. Serve with whipped cream.