Preheat oven to 350 degrees. Grease 9 x 13 inch pan.
Mix cake mix, graham crumbs, oil, water, eggs on low for 30 seconds. Beat on medium for 2 minutes. Pour into pan.
Save about 1/4 of the fudge sauce. Drop rest by Tablespoonsful randomly ih top of mixture.
Bake for 470 -45 minutes. Let cool some.
Spoon, by Tablespoonsful, the marshmallow cream on top of warm cake. Dip knife in hot water and spread cream on top of warm cake. Drop and swirl small dollops of reserved fudge. Let cool 2 hours. Store leftovers, uncovered, at room temp.