In a small saucepan, melt chocolate and butter over low heat; set aside. In a bowl, beat eggs and sugar until light and pale-colored. Add flour and melted chocolate; stir well. Pour into a greased 9-in. square baking pan. Bake at 350° for 25 minutes or until the brownies test done. Cool. , For filling, beat confectioners' sugar, peanut butter and butter in a bowl. Stir in cream until mixture reaches desired spreading consistency. Spread over cooled brownies; cover and chill until firm. , For glaze; melt chocolate and butter in a saucepan, stirring until smooth. Drizzle over the filling. Chill before cutting. Store in refrigerator.