1/2 c. butter
1/2 c. pkg. brown sugar
1 c. flour
1/2 c. graham crackers crumbs
1/2 c. chopped walnuts
2 c. miniature marshmallows
1 (6 oz.) pkg. semi-chocolate pieces

Beat butter and sugar until light and fluffy. Add combined flour and crumbs; mix well. Press onto bottom of greased 9-inch pan. Sprinkle with remaining ingredients. Bake at 375 degrees for 15 to 20 minutes or until golden brown. Cool; cut into bars. 16 servings.