Prepare cake mix according to directions. Put into a 9 x 13 inch pan.
Cover batter with rhubarb, sprinkle sugar over rhubarb. Pour whipping
cream over ingredients. (Rhubarb sinks with cream to make custard
while baking.) Bake at 350 degrees for 50 to 60 minutes or until
cake springs back when lightly touched. (Store leftovers in the
refrigerator.)