First, preheat the oven to 350ºF and place 2 tablespoons of butter on the bottom of a 10-inch cast iron pan. Then, place it in the oven to preheat with the oven.
Next, add all of the cornbread ingredients into a medium-sized bowl and mix until combined. The consistency should be like a thick pancake batter.
When the oven is preheated, carefully remove the castiron skillet from the oven using an oven mit.
Pour the cornbread batter into the castiron skillet and use a spatula to evenly spread it out.
Place the skillet back into the oven and bake at 350ºF for 20 minutes.
Remove from oven, cover the skillet with a piece of tin foil and then bake for another 10-12 minutes or until the center is fully cooked.*
Remove from the oven and let cool for at least 10 minutes before slicing.
Notes
*Time may vary by oven or by how hot the cast iron skillet was when started