Line 9x9 pan with nonstick foil.
In a microwave safe bowl, combine white chocolate and sweetened condensed milk.
Microwave at 70% power in 30 second increments until smooth.
Add processed cookie crumbs to to the melted white chocolate and stir well.
Allow the mixture to sit just a few minutes before adding chips or they will melt. A few streaks were fine with me.
Pour in the 1/2 cup chips and press into pan.
Sprinkle on other 1/2c. chips and chill until firm.
Cut into bars!