Except the jalapeños and corn, combine all ingredients in a large glass bowl.
Use a mixer or stir vigorously with a fork to mix in all dry ingredients.
Slowly fold in jalapenos and corn.
Pour all ingredients into the cast iron skillet.
Bake for 25 minutes or until golden brown.
Notes
You can adjust the heat. Less heat? Use half a can of jalapeños. More kick? Add a dash of cayenne pepper to the batter OR add ¼ t. of chopped FRESH jalapeño.
You can use canned corn instead of frozen corn if you prefer. Just be sure to drain it.