1 pkg. fudge marble cake mix (reserve marble pouch)
1/3 c. butter, softened

TOPPING:

1/4 c. water
2 eggs
1 c. miniature marshmallows
1 c. chopped nuts
6 oz. (1 c.) semi-sweet chocolate chips

Heat oven to 350 degrees. Grease 13 x 9 inch pan. In large bowl, combine base ingredients. Mix at high speed until crumbly. Reserve 1/4 cup crumbs for topping. Press remaining crumbs into prepared pan. In large bowl, blend reserved crumbs, water, eggs, and marble pouch until moistened. Beat 2 minutes at highest speed. Stir in nuts, marshmallows, and chips. Spread over crumb mixture in pan. Bake at 350 degrees for 25-35 minutes or until impression doesn't remain when touched. Cool and cut into bars.