Marie Callendars Sweet Cornbread. Just one box yellow cake mix, and two boxes jiffy corn muffin mix..... My family has been making corn bread like this for years. We use 1 box Jiffy corn muffin mix and 1 box Jiffy yellow cake mix. Follow directions on each, combine and pour in pan! I bake it somewhere between the two temps on the boxes for around 20 min. I can't believe I found this pin on here!