5 c. rhubarb, cut in 1/2 inch slices
1 c. sugar
1 (3 oz.) pkg. raspberry Jello
3 c. mini marshmallows
1 pkg. white cake mix, prepared as directed

Arrange rhubarb in greased 9x13 pan. Sprinkle with sugar and dry Jello. Top with marshmallows. Spread prepared cake mix evenly over mixture in pan.