01 - Preheat the waffle iron following the manufacturer's guidance and lightly grease the surfaces with oil or nonstick spray.
02 - In a large mixing bowl, whisk together cornmeal, all-purpose flour, baking powder, baking soda, salt, and ground black pepper until thoroughly combined.
03 - In a separate bowl, beat the eggs. Stir in the buttermilk and melted unsalted butter until well blended.
04 - Pour the wet mixture into the dry ingredients and stir gently, mixing only until just combined to avoid overworking the batter.
05 - Fold in the corn kernels, shredded cheddar cheese, chives or green onions, and jalapeño if desired until evenly distributed.
06 - Spoon approximately 2 tablespoons of batter into each segment of the waffle iron, adjusting for size as needed.
07 - Close the waffle iron lid and cook for 3 to 5 minutes, or until fritters are golden brown and crisp.
08 - Carefully remove finished fritters with a spatula and repeat with the remaining batter, regreasing the iron as necessary. Serve immediately while warm.