01 - Preheat the waffle iron following the manufacturer’s guidelines.
02 - Whisk together the flour, baking powder, sugar, baking soda, and salt in a large bowl.
03 - Add cold, cubed butter to the dry mix and cut in using a pastry cutter or fingertips until a coarse crumb forms.
04 - Combine buttermilk and eggs in a separate bowl; whisk until blended.
05 - Gently fold the wet ingredients into the dry mixture; avoid overmixing.
06 - Fold in shredded cheddar, diced jalapeños, and chives until evenly distributed.
07 - Lightly grease the waffle iron before use.
08 - Spoon batter onto the hot iron and spread to cover. Close and cook for 4 to 5 minutes or until golden and crisp.
09 - Remove waffles and serve promptly, optionally topped with butter or honey.