Preheat your waffle iron and grease it with cooking spray or melted butter.

In a large mixing bowl, combine cornmeal, all-purpose flour, baking powder, baking soda, and salt. Whisk until well-blended.

In a separate bowl, whisk together buttermilk, melted butter, and eggs until smooth.

Gently fold the wet ingredients into the dry ingredients until just combined. Fold in cheddar cheese and jalapeños.

Pour ¾ cup of batter into the preheated waffle iron and cook for approximately 5 to 7 minutes until golden brown.

Carefully remove the waffles and serve hot with desired toppings.