Toss lightly in 8 1/4 ... white or yellow cake mix. Pour half over the rhubarb mix. Bake the remaining batter ... for a second upside down cake. Bake 375 degrees for ... 1 1/2 cups rhubarb.
Mix first four ingredients and ... pan. Mix yellow cake mix as directed on package. Place over rhubarb mixture in pan. Bake as ... mix package. Turn upside down when warm and serve with ice cream or Cool Whip.