First pre heat oven to 350F. Then spray bottom & sides of 13x9 inch pan with cooking spray. Then in large bowl stir cookie mix, butter & egg until soft dough forms. Then stir in candies & press dough in bottom of the pan. Then bake 18 to 20 mins or until light golden brown.
Next in a 2 quart saucepan heat caramels & milk over medium heat & make sure to stir constantly until caramels are melted. Then stir in the peanut butter. Then heat to boiling. Then cook 2 mins, stirring frequently. Remove from heat & stir in 1/2 cup peanuts & spread over warm cookie base. Let cool completely for about 2 hours.
Then spread the frosting evenly over filling. Then sprinkle with the chopped peanuts. Refrigerate about 2 hours or until chilled. Then to make the bars cut 9 rows by 4 rows. Then store covered in refrigerator.