This is so good and rumored to be the cornbread served at the Disney Resorts.
Use these exact ingredients -- brand is important here.
1 Box Jiffy Cornbread Mix
1 Box Jiffy Golden Yellow Cake Mix
1/3 cup milk and
1/2 cup cold water
Mix all together well and pour into a greased 8 x 8 square pan.
350 degrees for 30 minutes.