2jalapeños seeded and diced (optional extra slices for top)
Place oil in a 9 or 10 inch cast iron skillet (or grease a 9x9 inch pan with cooking spraand place skillet in the oven and preheat it to 400 degrees F.
In a large mixing bowl, combine flour, cornmeal, sugar, baking powder, baking soda, and salt.
Add the buttermilk, melted butter, and eggs and mix until combined. Fold in 1 cup of cheese, corn, and diced jalapenos.
Remove the skillet from the oven. Rotate the pan so the oil gets on the sides of the pan (or you can use a heat proof pastry brush).
Pour batter in pan, top with sliced jalapeños and remaining 1/2 cup cheese, and place in the oven. Bake for 20-25 minutes until a toothpick inserted in the middle comes out clean. Let cool in pan for 10 minutes before slicing.