Combine the eggs, oil, and milk and add them to the dry ingredients.
Stir in the cream corn, onion, crawfish, and cheese. Blend well.
Melt three tablespoons of butter in a large cast-iron skillet.
Remove it from the oven and pour in the cornbread batter.
Pour batter into cast-iron skillet and bake at 375 degrees F for 45 to 55 minutes.