Line 8x8" pan with parchment & spritz with cooking spray
In a medium saucepan heat butter until fully melted
Add sweetened condensed milk
Then add in white chocolate chips & cook until fully melted
Add in marshmallow creme & remove from heat
Fold in crushed cookies
Spread in pan into an even layer
Top with remaining crushed cookies
Refrigerate 1-2 hours to firm before cutting