Mystery Squares - cooking recipe

Ingredients

1 pkg. graham crackers, crushed
1/2 c. butter, melted
1 c. walnuts
1 c. chocolate chips
1 1/2 c. coconut (if desired)
1 (14 oz.) can condensed milk

Preparation

Mix graham crackers and butter together.
Line 9 x 14-inch pan with this mixture.
Mix walnuts, chocolate chips and coconut; spread over crust.
Pour condensed milk over the top and bake at 350\u00b0 for 35 to 40 minutes.