Preheat oven to 350 degrees.
In a 13 x 9 baking pan, generously coat all sides with cooking spray with flour in it. I used Pam cooking spray with flour in it. If you don’t have it, coat with cooking spray and sprinkle bottom and sides with a little flour. Add butter and place in the oven to melt. This will take no more than a minute or two.
Sprinkle the graham cracker crumbs evenly over the top of the butter and pat down a little. Do not mix.
Sprinkle the coconut evenly over the crumbs.
Sprinkle the chocolate chips evenly over the coconut.
Drizzle the sweetened condensed milk evenly over the chips. To make the milk easier to drizzle, place the can in a bowl of hot water for a few minutes.
Top with the nuts.
Bake for about 20-25 minutes until golden brown.
Cut into 24 squares while still somewhat hot. If you let them cool they become very difficult to cut!