1/2 c. butter, softened
1/2 c. packed brown sugar
1 c. flour
1/2 c. graham cracker crumbs
2 c. miniature marshmallows
6 oz. chocolate chips
1/2 c. chopped walnuts

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