In a greased pan, place 4 to 5 cut-up rhubarb. Sprinkle 1/2 to 1 ... marshmallows. Prepare yellow cake according to the directions on ... a tray or dish.
Preheat oven to 350 degrees. ... sugar over the rhubarb in a 9"x13" pan. Add ... package of yellow cake mix according to the directions ... little and tip upside down on a cookie sheet or ... take longer to bake.
Prepare as directed. Put several cups of rhubarb on bottom of greased pan. Place the mixed cake mixture on top of the ... turn the cake upside down and cool.