Preheat your waffle maker according to the manufacturer’s instructions. Lightly grease the plates with cooking spray or oil.

In a large mixing bowl, whisk together the yellow cornmeal, all-purpose flour, granulated sugar, baking powder, baking soda, and salt until no lumps remain.

In a separate bowl, whisk together the buttermilk, eggs, and melted butter until fully combined.

Gently pour the wet mixture into the dry ingredients, stirring carefully just until combined. Avoid overmixing; the batter should be slightly lumpy.

Fold in the shredded cheddar cheese, chopped green onions, and jalapeños.

Ladle batter into the preheated waffle maker, close the lid, and cook for about 4-6 minutes until golden brown.

Carefully remove the waffles and keep warm on a wire rack. Serve immediately with your choice of toppings.