I think this is the recipe you are looking for. It has various names besides Magic Cookie Bars. They also are called Hello Dollies, I believe.

(Makes about 2-doz 1 1/2-inch X 3-inch bars.)

1/2 cup (1 stick) butter
1 1/2 cups graham cracker crumbs
1 cup Diamond Walnuts, coarsely chopped
1 cup (6 oz pkg) Nestles Semi-Sweet Chocolate or Nestle's Butterscotch Flavored Morsels
1 1/2 cups (3 1/2 oz can) flaked coconut
1 1/2 cups (15 oz can) Eagle Brand Sweetened Condensed Milk

Pour melted butter onto the bottom of a 13 x 9 x 2 inch pan. Sprinkle crumbs evenly over melted butter. Sprinkle chopped nuts, then sprinkle coconut. Pour sweetened condensed milk evenly over all. Bake in 350 deg oven 25 min or until lightly browned on top. Cool in pan 15 min, then cut into bars.