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

Beat butter and sugar together; add flour and graham cracker crumbs; mix well. Press onto bottom of greased 11x7 pan. Sprinkle with remaining ingredients. Bake at 375 degrees for 15-20 minutes or until golden brown.