Pour canola oil in the bottom of an 8-inch cast iron skillet and put the skillet in the oven for 15 minutes to season it.
Dump out the excess oil before putting the cornbread in it.
In a large mixing bowl, mix all of the dry ingredients.
Melt the butter.
Pour the milk and cream into the butter to cool it.
Add the eggs and mix well.
Pour the wet ingredients into the dry mixture and mix well.
Pour the batter into the hot cast iron skillet and bake at 450 degrees for 18-20 minutes until the bread pulls away from the sides and the top is turning golden brown.