I found this one not sure if this is what you are looking for
JOHNNEY CORNBREAD
1 package "Jiffy" yellow cake mix (1 layer size)
1 cup yellow cornmeal
1 cup all-purpose flour
4 tsp. baking powder
1 cup milk
1/4 cup melted butter
1 egg
Preheat oven to 400 degrees F. Greased two (8-inch) pie pans or one (13x9x2-inch) baking pan.
Mix cake mix according to directions, being careful not to beat air into mixture; set aside.
In a seperate bowl, mix the rest of the ingredients and gently fold in cake batter. Pour into prepared pan(s).
Bake in a preheated oven 35-40 minutes or until lightly browned.