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.) chocolate chips
1/2 c. chopped walnuts

Mix butter and sugar until light and fluffy. Add flour and crumbs, mix well. Press in bottom of greased 9-inch square pan. Sprinkle marshmallows, walnuts and chips on top. Bake at 375 degrees for 15-20 minutes.