Preheat oven to 350F. Line a 9x13” pan with foil and spray with cooking spray.
I used a box of graham cracker crumbs, but if you only have actual graham crackers, process them in a food processor until they are a fine crumb. Stir into butter. Press into the bottom of your prepared pan.
Sprinkle white chocolate chips, peanut butter chips, coconut, and candy corn over the top. Pour sweetened condensed milk evenly over the top of the bars.
Bake for about 25 minutes, until they get golden around the edges. Cool completely before slicing into bars.