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

Cream butter and sugar. Add flour and graham cracker crumbs, mix well. Press onto bottom of greased 9-inch square pan. Sprinkle with marshmallows and chocolate chips. Bake at 375 degrees for 15-20 minutes. Cool. Cut into bars.