Step 1

Preheat oven to 350 degrees. Spray a 9x13 inch baking pan with cooking spray and set aside.

Step 2

Melt butter in a small saucepan. Remove from heat and stir in graham cracker crumbs until throughly combined. Press into the bottom of a 9x13 inch baking pan to form the crust.

Step 3

Evenly sprinkle remaining ingredients one by one over the crust to form layers, beginning with the chocolate chips, followed by the butterscotch chips, coconut, and walnuts. Pour the condensed milk evenly over the top, and spread with a rubber spatula to make sure it's evenly distributed.

Step 4

Bake in preheated oven for 25-30 minutes until edges are golden brown and the middle is set.

Step 5

Allow to cool completely before slicing. Enjoy!