Preheat oven to 350° F.

Lightly spray a 9 x 13-inch pan with oil and line with parchment paper.

Place the butter and graham crackers in a food processor and pulse until the crackers are crushed and combined with the butter.

Place the crushed graham cracker mixture in the pan and pat down in an even layer to form the crust.

Sprinkle the coconut on top followed by the chocolate chips.

Pour the condensed milk evenly on top of the chips, then sprinkle the walnuts over the condensed milk.

Press the layers down gently and bake for 30 minutes.

Set aside to cool completely, cut into bars and serve.

* Recipe from Best Bake Sale Cookbook by Gretchen Holt-Witt