by Carol Arroyo Rhubarb Cornmeal Upside-Down Cake Pan: One 10" Cast Iron Skillet, or One 9" Round, or One 10" Round, or One 10" Springform Oven Temp: 350° Storage: Covered, Room Temperature or Refrigerate Help: Cake Hints and Tips Shop for this Recipe: Measuring Cups, Spoons, Scales | Cast Iron