Butterscotch Apple Squares

¼ cup butter
1 ½ cups graham cracker crumbs
1 ¼ cups chopped and peeled apples
6 oz. butterscotch chips
1 can sweetened condensed milk
1 1/3 cups shredded coconut
1 cup chopped walnuts

Melt butter in 13x9 inch baking pan. Sprinkle crumbs evenly over butter. Spread apples evenly over crumbs. Melt butterscotch chips with condensed milk in top of double boiler; when smooth, pour evenly over apples. Top with coconut and nuts. Press down gently. Bake at 325 degrees for 25-30 minutes or until lightly browned. Cool thoroughly, then chill. Cut into bars to serve.