Rhubarb Dessert

Place 4 cups chunked rhubarb in 9x13 pan. Sprinkle over 3 oz. pkg. raspberry jello. Sprinkle over 1/2 c. sugar. Spread over marshmallows. Then mix up white cake mix and pour over marshmallows. Bake at 375 degrees for 3 minutes, then 15 minutes at 350-325 degrees. Top with Cool Whip or serve with ice cream.