Line an 8X8 pan with tinfoil and spray with cooking spray.
Mix together melted butter and crushed graham crackers, until well incorporated. Spread evenly, on to the bottom of the pan.
Then sprinkle coconut flakes on top. Followed by a layer of chocolate chips and then butterscotch chips. Mix the nuts together and sprinkle them on top. Pour the sweetened condensed milk over the entire pan, making sure to cover all the nuts.
Bake at 350 for 30 minutes. Remove from oven and let sit for 5 minutes, then carefully remove the tin foil liner from the hot pan. Let bars rest 1 hour before cutting them. Cut into 9 squares and enjoy!