In a 13x9 baking pan, coat with baking spray.
Mix the graham crackers and melted butter in a bowl and once mixed, spread evenly across the bottom of the pan pressing to the bottom.
Layer chocolate chips, marshmallows and coconut and press firmly with a fork.
Finish by pouring the condensed milk on top
NOTE: Many use nuts in place of the marshmallows but my son doesn't like nuts so hence the marshmallows.
Bake 350 for 30 minutes or until light brown