Magic Cookie Bars are built in layers directly in the pan: a melted butter and graham cracker base, a pour of sweetened condensed milk, then chocolate chips, shredded coconut, and chopped nuts on top. The condensed milk binds everything together as it bakes, creating bars that are chewy, crunchy, and sweet all at once. They take about 30 minutes to bake and need only a short cooling time before cutting.