Peanut Butter Pie

3 ounces cream cheese
1 cup sifted powdered sugar
1/3 cup plus 2 tablespoons creamy peanut butter
1/2 cup milk
10 ounces whipped topping
1 baked 9 inch pie shell

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Beat cream cheese, sugar and peanut butter with an electric mixer until smooth. Slowly blend in milk. Fold in whipped topping and spoon mixture into a baked 9″ pie shell. Freeze.