In a large mixing bowl, whisk together the flour, cornmeal, sugar, baking powder, jalapeno, salt and 1 cup of the grated cheese.
In a separate mixing bowl, beat the eggs, then whisk in the buttermilk and vegetable oil. Incorporate the wet ingredients into the dry ingredients and mix just until combined.
Heat a waffle iron and spray with nonstick spray. Pour 1 1/2 cups of the batter into the waffle iron and cook until golden brown, about 5 minutes. (Follow the manufacturer's directions. You may need to adjust amount of batter based on your waffle iron.) Transfer the waffles to a wire rack set over a baking sheet. Repeat with the remaining batter.
Just before serving, turn the broiler to low. Scatter the remaining 1 cup grated cheese over the waffles and broil just until the cheese has melted, about 1 minute.