The SECRET recipe, please follow carefully:
1 box yellow cake mix
2 of those tiny Jiffy Mix Cornbread Mixes
and whatever stuff it calls for on the boxes
to make the cornbread and cake
(water, milk, eggs, oil)
Mix them all together in one big bowl.
Bake it at whatever temperature it says on the boxes (if they say different temps, then I shoot for somewhere in between),
for whatever time it says is appropriate for your pan
(but I usually check it 5 minutes early with a toothpick.)
Obviously this recipe was developed using exacting scientific laboratory standards and I cannot guarantee your results at home.