Triple Layer Mud Pie

3 squares semi-sweet baking chocolate, melted
¼ cup canned sweetened condensed milk
1 chocolate crumb pie crust
½ cup pecan pieces
2 cup cold milk
2 pkgs. Jell-O chocolate instant pudding
8 oz Cool Whip, thawed

Mix baking chocolate and condensed milk until blended. Pour into crust; sprinkle with pecans. Beat milk and pudding for 2 minutes. Spoon 1½ cup over pecans in crust. Add ½ of Cool Whip to remaining pudding; stir and spread over pudding in crust. Top with remaining Cool Whip. Refrigerate 3 hours.