CAKES RHUBARB UPSIDE DOWN CAKE 5 c. Rhubarb, cut into 1/2 inch pieces (raw) 1 c. Sugar 1 (3 oz.) pkg. Raspberry or Strawberry Jello 1 pkg. White or Yellow Cake Mix, prepared according to box instructions 3 c. miniature Marshmallows In greased and floured 9 x 13 inch pan, first spread rhubarb, then sprinkle Jello and sugar over rhubarb. Next spread marshmallows evenly over all. Finally pour cake batter over all. Bake at 350 degrees for 50-55 minutes. Cool at least 5 minutes before inverting pan.